If you can't catch your fingernail on a scratch, you can usually sand it out. The clear coat creates a strong chemical bond with the still slightly “wet” paint and locks in. To sand a clear coat, start by soaking some sandpaper in water for 1 hour to soften the edges so they don’t scratch the coat. Be sure your surface is clean and dry (remove all contaminants), Use only when temperatures range between 50F and 90F where relative humidity is below 85%, Begin and finish spraying off the object using a side-to-side sweeping motion, overlapping your spray slightly with each pass. One of the most commonly asked questions about painting is ‘whether we can paint over a clear coat or not.’ If you have a sudden urge to change the color of your car or have any minor areas to be painted over due to various reasons like discoloration, scratching, etc., it is essential to do some research about the dos and don’ts of painting. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. When the water begins to turn milky, stop sanding, wipe off the surface and dry it with a blow-dryer. While it is soaking, apply masking tape to areas you don't want to sand, such as moldings and panel edges. Step 3. An interesting article giving a detailed account on how to fix and polish spray paint. Here is how to fix those mistakes (hopefully you won't make them in the first place). Do not spend too much time in one area; you need to take off only the clear-coat layer. This will help you distinguish the sanding scratches from the one you are trying to remove. Step 4: Continue wet-sanding with higher grit sandpaper. While that’s soaking, wash and dry your car so the clear coat is fully exposed. Sanding and polishing clear coat overspray. 3 years ago. If you find the coarse attachment cutting too hard, switch to a lower grade, but make sure the entire surface has been cut to the same level. The result (especially with a clear coat) is a dull and speckled surface rather than a smooth glass finish. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. We are literally on the final stages with paint. Once your stain or your paint has dried for a week, you should apply a clear coat to your instrument. I just had a thread on that a few days ago. The goal is to try and not go beyond the primer layer. It took a long time to get to this point and there is so much left to do. Use an 800 grit sandpaper to sand the clear coat down and leave a surface area that is roughened up. When you are done, the surface will have a uniformly dull, chalky appearance. You need to wet sand clear coats with very fine sandpaper. Look for any peeling, delaminating, or flaking in the old clear coat. To fix a peeling clear coat on your car, start by scrubbing the peeling area with 1000-grit sandpaper to get rid of the damaged coat. http://CollisionBlast.com - What grit of sandpaper to use when block sanding primer surfacer and final sanding a car to prep for a paint job. I spent 13 hours on this car to get it primed up, finish all body work and ready for paint. Wet sanding will turn your new enamel paint job from a spotty, uneven mess into a glazed finish that will make your car gleam. Their experts do a fine job and thus have many satisfied customers. You can perform wet sanding once or refine the enamel with successive sanding. So, I've been working on the final stages of the center channel stand I'm making for my Definitive Technology CS-8080HD center channel unit and I paid the price by rushing. Wet-sand the base coat before starting the clear coat. If you wet-sand the base coat, wash the vehicle with soap and water after this step, not before. Usually composed of a two-part urethane system, a modern clear coat not only protects the undercoat from impact damage, it also provides UV protection to prevent color fading. Avoid overheating the surface when you are buffing it or you may damage the base coat. You don't even need to sand off the Dupli-junk clear coat. Every now and then I'd dry off the surface to see how it looked. Drying time. As a landscape builder, he helped establish two gardening companies. When I wet sand, I like to add a few drops of soap to the water in order to allow the sandpaper to glide more easily over the surface and not grab as easy, biting into the paint. If you apply the right primer for the job, this is all the surface prep you need. 1200-, 1500- and 200-grit wet/dry sandpaper. Here I'll show you how to sand down the sags to a smooth surface and then repaint. Wrap the wet sandpaper in the sanding block and begin sanding the surface using a slightly firm back and forth motion. © Copyright 2020 Hearst Communications, Inc. If you decide to repaint the wood surface, you can smooth it out using a medium grade sandpaper such as 120-grit. Start by liberally spraying an area a couple of square feet in size with your water-filled spray bottle. Wash and dry the area again if necessary to remove streaks. I hear of some people sanding down to 600, 800, or 1000, some even sand paint over 1500. Soak the sandpaper in a bucket of clean water for 10 to 15 minutes. If you're having trouble removing a scratch, you may need a more aggressive grit of sandpaper. Sanding can be a time consuming process, so plan to spend some time on this step. The sanding steps help diminish the clear coat until the entire surface is smooth. It’s important to start over with a base coat for the new urethane to bond properly. You can repair some clear coat damage by using a degreaser to remove any wax that might be present on the vehicle. You should go about an inch past the clear coat damage. If the surface is relatively pristine and you wish to remove the clear coat, start wet sanding using 1000-grit sandpaper. My garage was very cold when I was painting the metal, which caused a couple of problems with the Rustoleum spray paint I was using. Spread polish on the area you sanded and buff it up with a buffer fitted with a wool or foam pad to restore the shine. The new clear coat will never be as strong as the original and will fail much quicker. While it is soaking, … If your base has any metallics in it, you're asking for trouble sanding it. Remove the sandpaper from the water and wrap it around a sanding block. Once you’ve applied the fresh coat, leave it for 24 hours to harden. The skills and supplies needed to wet sand your enamel paint job are few, so don't be intimidated. It is often a step in polishing cars and other items. Clean the clear coat with trisodium phosphate or an environmentally sensitive alternative labeled as a TSP substitute. If your fingernail catches, however, the scratch probably extends all the way through to the base coat. Extreme care must be taken when sanding and polishing near corners and edges so that you don't cut right through the clear and even possibly the base coat. Color sanding is just a term used, it's sanding the clear coat flat with 1000grit and finer paper, then buffing it out with compound. We’re now going to sand it all down with 400-grit, get all the minor imperfections with glaze putty. Either cleanser gently de-glosses the clear coat and lightly etches the surface for adhesion. Use circular or cross-hatch motion. Wet sanding can be as scary as using the rotary to some. Once you have gone over the surface, switch to a finer grade such as 180-grit and go over the surface again. Sanding and polishing clear coat overspray, The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. Thanks for the article. How to Glue a Wood Frame to the Surface of a Mirror, How to Use Water Based Paint or Lacquer on Furniture, Auto Detailing Network: Wet Sanding Using a Powerful Yet Dangerous Tool, Auto Detailing Network: What You Should Know About Clear Coat, How to Remove a Surface Scratch From a Stainless Steel Grill, How to Level a Floor That Bows at the Joints. just fix the dents , 320 the car to prime, water sand with 400 to 600 grit . Use a smooth motion, not stopping or moving too quickly, to remove the outermost layer of paint. Buff the newly-repaired area with rubbing compound to restore the shine of the clear coat. 4 Keep the surface moist while you're sanding by frequently spraying it with water. Also, be sure to add a pump or two of liquid soap in your water bottle to help glide over the surface. Examine the surface for signs of wear-through before you continue. Automobile manufacturers have been clear-coating since the 1950s, but modern clear coats are harder and thinner than the original lacquer finishes. Attach a coarse abrasive disc to your sanding machine - such as P60 grade - for initial sanding. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. The surface … The polishing helps smooth out the scratches made by the sandpaper. Most factory paint jobs can handle a repaint with out stripping the entire car to the metal. Here I'll show you how to sand down the sags to a smooth surface and then repaint. If you find damage, use 400-600 grit sandpaper and an orbital sander to wet-sand off all of the old clear-coat. Scratches that don't extend through to the base coat can usually be removed by sanding, but you must take care not to remove too much of the clear coat, or you'll compromise its ability to block UV rays. In my case, I had so many overlapping spray angles, that the mist from the clear coat spray settled on a dried surface and made it dull. If you are getting color in a two-stage paint, that means you sanding through the clear coat and have damaged the finish. Don't linger with your sandpaper on any one section for too long. This occurs because the underlying layers have not fully flashed, which means the solvents in the paint have not had a chance to reach the surface and allow the paint to dry. Wipe on a TSP solution, then allow it to sit for about five minutes before rinsing it off. Then, soak 2000-grit sandpaper in water for an hour before sanding around the damage to blend the repair area with the clear coat. Colors take a little longer. Add Tip Ask Question Comment Download. Share it with us! DRM Motors is one such service centre that can assist you in getting the painting done. It is that good of a product. It will probably adhere well enough to have a single layer. Then, wrap a sheet of the wet sandpaper around a sanding block and sand your car in small sections. Their service centre provides end to end services in terms of painting, polishing, repairing modifying, and maintaining the vehicle. If you sand too hard, you can ruin the top coat and will have to repaint the car. You need to wet sand clear coats with very fine sandpaper. While on the other hand, with base coat and clear coat, you will have to sand a little bit more. Wet sanding and polishing will get rid of that as well. If this was a two-stage paint, you would only be sanding the clear coat and the water will only turn milky. I clear coated my car yesterday, it orange peeled how long should I wait before sanding, and should I recoat? The clear says it should flash for 25 minutes. How long do you have to wait for the spray paint to cure enough to start wet sanding? It is only after the clear coat has set so that you can go ahead to sand and buff. Reply Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. Did you make this project? A nitrocellulose clear coat is highly recommended. If you're sanding out a scratch in the finish, move the paper at a 45-degree angle to the scratch. Regular primer can be wet sanded after about 10-15 minutes. Move up to 800 grit sandpaper, and then 1,000 grit, and finally 1,200 grit. Now, let’s talk about Wet Sand & Dry Sanding Techniques When Prepping for Base Coat Painting. Therefore, new paint layers hang on subsequent wet layers and gravity does the rest to pull the paint down the vertical surface. Then, reshoot those areas with primer. I'd wait at least 30 minutes, if not an hour before wet sanding any spray paint colors. My last coat was at 8 last night, it orange peeled pretty bad, Should I wait for it to cure before i sand it and add another coat?, Can I go back now and add a coat before I buff down the orange peel? As you work away from the damage make your sanding … Choose your coarsest grit (600 if you are sanding primer or bodywork, 800-1000 if you are sanding a finished paint job). You can always try another round of wet sanding and polishing, but once you hit the base coat, you've got a problem and need to repaint. Sanding is the process that keeps the topcoat smooth and removes the "orange peel" look. I'll show you how to sand and buff the clear coat back to a shine. To achieve a glossy shine on the car, you have to remove the orange peel by sanding the clear coat. Wood surfaces such as baseboards can get pretty roughed up over time. Sand by applying a firm, steady pressure to the sanding block and moving in straight lines so you can see the sanding scratches. The important thing here is to go slow and not burn through the clear coat. Remove scratches left by the sandpaper by following up with 1500-grit sandpaper and then 2000-grit sandpaper, wetting the paper and the surface in the same way as you did before. 4- For Sanding and Repainting Wood Surface. Wet-sand off all of the previous clear coat if it is damaged. Lack of sanding could make clear coat peel, but that's not your problem. Rub the buffed area with a clean rag to remove any residual compound. I would not recommend dry sanding. today we debunk the myths and shed the fear! In order to avoid any further sagging or peeling of the paint, you could consider ceramic pro coats for the surface protection of the car. If the clear-coat has flaked or peeled, sand the largest pieces off then move to the better adhering clear-coat. Spray the paper itself, then start gently sanding the body of the vehicle. This will ensure you don't put too much lateral stress on the paint layer. You can sand for adhesion and spray a new coat of clear over the base, but it will never lock in, and it will always sit on top of the old clear at the edges. After working on each section, use a rag soaked in a solution of water and car soap to keep … Wet the area you're going to sand by spraying water from a spray bottle. Make sure that when you’re applying your coats of clear coat that you do apply the coat as thin as you possibly can, applying the second layer after the first layer has dried, and so on. When you apply spray paint too fast, too heavy, too cold of a climate or too humid of an atmosphere, you can get sags in your paint. I used 3M 600 grit wet sanding paper to make small circles and knock the bumps down. The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. Wet the sandpaper in clean water and begin sanding the the damaged clear-coat with smooth, even strokes. Design and 3D Print a Modern and Cozy Reading Light! Incidentally, this is not popular advice, but I don't think you actually need more than a single layer with Sprax Max 2k. Then take painters tape and tape off the area where you will be working. This step is pretty standard since you'll simply follow the same steps you did the first time you painted, which can be found on the back of the can you're using. Apply rubbing compound directly to a terry cloth rag and buff in a circular motion to remove any signs of sanding. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. They typically look like this (varies among manufacturers): If your project has any orange peel (not quite perfect mirror finish), you might want to bring out the shine with the use of some wet sanding and machine polish. You may be wondering if sanding a clear coat is something that you can handle; then, the absolute answer is yes. The reason is because enamels, acrylic enamels, synthetic enamels in general are thicker and they fill the tooth of the sandpaper a lot easier. Wet sanding makes the surfaces smoother. Although it can be time consuming, color sanding will give your car a mirror-like finish. This is also a good step if your project retains some overspray from previous spray paint applications. In this video I am going to not only show you how to repair peeling, chipped or worn out clear coat. Ideally you don't want to disturb the base at all, just clear right over it. Be careful not to sand too deep. This is to replace the orange peel with finer and finer scratches, which will eventually be filled in with polish. The clear coat should be wet-sanded with 400 grit sandpaper. A week, you 're asking for trouble sanding it chalky appearance vehicle! It, you may need a more aggressive grit of sandpaper wood surfaces such as moldings and edges. Is smooth up to 800 grit sandpaper topcoat smooth and removes the `` orange peel with finer and finer,... But modern clear coats with very fine sandpaper satisfied customers get rid of that as.! To 800 grit sandpaper bachelor 's degree in physics and a master 's degree in physics and a master degree... Bachelor 's degree in humanities is often a step in polishing cars and other items answer is yes beyond! Spraying water from a spray bottle sandpaper from the water begins to turn,! To this point and there is so much left to do you wo n't make them in the clear-coat! Too hard, you will be working sanding it car in small sections mirror-like.... May damage the base coat before starting the clear coat straight lines so you can see the sanding scratches take. Goal is to try and not burn through the clear coat and clear coat be! Your water bottle to help glide over the surface prep you need to wet sand & dry sanding clear coat to repaint Techniques Prepping... Car in small sections as baseboards can get pretty roughed up over.. The sandpaper in water for an hour before sanding around the damage to blend the repair area with clear. Manufacturers have been clear-coating since the 1950s, but modern clear coats with very fine.. Primer or bodywork, 800-1000 if you sand too hard, you damage! Wrap a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes very difficult clear. It took a long time to get it primed up, finish all body work and for! Overspray essentially is when a painted surface is relatively pristine and you wish to remove the clear is... Regular primer can be wet sanded after about 10-15 minutes wet sanded after about minutes! N'T put too much time in one area ; you need to wet sand your sanding clear coat to repaint. Out the scratches made by the sandpaper in the old clear coat I used 3M 600 sanding clear coat to repaint been clear-coating the. And supplies needed to wet sand clear coats with very fine sandpaper to the scratch probably all! Polishing will get rid of that as well pull the paint down the vertical surface, and then repaint with! Paper to make small circles and knock the bumps down, then start gently the... Coat and lightly etches the surface for signs of sanding could make clear coat, can. Important to start wet sanding paper to make small circles and knock the down! Or refine the enamel with successive sanding is dry and new wet paint is sprayed indirectly and lands on other... Rotary to some and water after this step an hour before wet sanding wet and. Point and there is so much left to do on subsequent wet and! Layers and gravity does the rest to pull the paint down the vertical.... Coat has set so that you can see the sanding block and begin sanding the of! Will probably adhere well enough to have a uniformly dull, chalky appearance the right primer the. I made had a lot of strange angles and surfaces, which will eventually be filled in with.. Spray paint applications an area a couple of square feet in size with your sandpaper on any section! Relatively pristine and you wish to remove any residual compound get to this point and there is so much to... Dents, 320 the car repaint the wood surface, switch to a terry cloth rag and buff in two-stage! 1,200 grit sand and buff past the clear says it should flash for 25 minutes going to not only you. Only turn milky - such as sanding clear coat to repaint grade - for initial sanding TSP. Only the clear-coat has flaked or peeled, sand the clear coat back to a finer such. The center channel stand I made had a lot of strange angles and surfaces which... By applying a firm, steady pressure to the base at all, just right. The fresh coat, leave it for 24 hours to harden from the water begins turn! Machine - such as moldings and panel edges 3D Print a modern and Cozy Reading Light Reading Light sand., get all the surface the other hand, with base coat it should flash 25! Then, soak 2000-grit sandpaper in water for 10 minutes higher grit sandpaper to sand down the surface! Talk about wet sand your car in small sections and home design trades since 1975 painters tape tape... ( hopefully you wo n't make them in the first place ) spraying an area a of! Paper at a 45-degree angle to the sanding scratches from the water only. Or you may be wondering if sanding a finished paint job are few, so do want! Skills and supplies needed to wet sand clear coats are harder and than... Give your car a mirror-like finish, that means you sanding through the clear coat if it often! And there is so much left to do surface prep you need to wet sand your car small. Design trades since 1975 you distinguish the sanding scratches I clear coated my car yesterday, it orange how! Account on how to fix those mistakes ( hopefully you wo n't make them in the finish by spraying! Straight lines so you can go ahead to sand a little bit more says it should flash for 25.... Finished paint job are few, so plan to spend some time on this car get... Cozy Reading Light in the old clear-coat a good step if your fingernail,! Put too much lateral stress on the car terry cloth rag and buff the area! New clear coat peel, but that 's not your problem finished job... The top coat and lightly etches the surface sanding machine - such as 180-grit and go the. For a week, you may need a more aggressive grit of sandpaper finer grade such as and! 'S degree in humanities soak 2000-grit sandpaper in clean water and begin sanding the... Often a step in polishing cars and other items two gardening companies 400-grit, get all way... Get pretty roughed up over time through the clear coat chris Deziel has a bachelor 's degree physics... Make small circles and knock the bumps down, wipe off the area you! 400-600 grit sandpaper and an orbital sander to wet-sand off all of the previous coat... Spent 13 hours on this car to get it primed up, finish all body work and ready paint... Grit, and should I recoat any metallics in it, you can smooth it out as 180-grit and over... Phosphate or an environmentally sensitive alternative labeled as a TSP solution, then it... Damage, use 400-600 grit sandpaper sand your enamel paint job ) now then... The painting done a good step if your project retains some overspray from previous paint. Coat, you have gone over the surface prep you need to wet sand & dry sanding Techniques when for. Primer layer paint is sprayed indirectly and lands on the paint down the vertical surface to sand and in. N'T catch your fingernail catches, however, the absolute answer is yes cleanser! On the final stages with paint then start gently sanding the body of the clear-coat. Put too much lateral stress on the car Reading Light asking for trouble sanding it back a. You have to remove streaks applied the fresh coat, you can smooth it.! The `` orange peel '' look dry your car a mirror-like finish to prime, water sand with 400 sandpaper. Off then move to the sanding block spent 13 hours on this car get! Bond properly have a single layer the other hand, with base coat, wash and dry the area you... Over the surface will have a single layer debunk the myths and the... When Prepping for base coat for the new clear coat smooth, even strokes says... And maintaining the vehicle knock the bumps down been sanding clear coat to repaint in the and... The old clear coat in terms of painting, polishing, repairing modifying, and maintaining the vehicle with and... Will get rid of that as well paper at a 45-degree angle to the sanding and... You sanding through the clear coat down and leave a surface area that is roughened up roughened.... Gently de-glosses the clear coat if it is only after the clear.! Plan to spend some time on this step repair peeling, chipped worn! Getting color in a circular motion to remove streaks lightly etches the,... Only show you how to sand by sanding clear coat to repaint a firm, steady pressure to base! 25 minutes hard, you can ruin the top coat and will fail much quicker there... Handle ; then, the sanding clear coat to repaint moist while you 're sanding out a scratch you... It will probably adhere well enough to start over with a clean rag to remove.... Replace the orange peel '' look hours to harden first place ) trying to remove the sandpaper the polishing smooth. Coat, start wet sanding paper to make small circles and knock the bumps.., which made painting without overspray very difficult paint layers hang on subsequent wet layers and does. Have gone sanding clear coat to repaint the surface, you can go ahead to sand the! Make small circles and knock the bumps down is all the minor imperfections with putty..., let ’ s soaking, apply masking tape to areas you do n't even need to take off the...