Sand by applying a firm, steady pressure to the sanding block and moving in straight lines so you can see the sanding scratches. Then, reshoot those areas with primer. If your fingernail catches, however, the scratch probably extends all the way through to the base coat. Sanding is the process that keeps the topcoat smooth and removes the "orange peel" look. 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. 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. Their service centre provides end to end services in terms of painting, polishing, repairing modifying, and maintaining the vehicle. 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. © Copyright 2020 Hearst Communications, Inc. 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. 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. Then, wrap a sheet of the wet sandpaper around a sanding block and sand your car in small sections. This is to replace the orange peel with finer and finer scratches, which will eventually be filled in with polish. Look for any peeling, delaminating, or flaking in the old clear coat. Wet the sandpaper in clean water and begin sanding the the damaged clear-coat with smooth, even strokes. Move up to 800 grit sandpaper, and then 1,000 grit, and finally 1,200 grit. Did you make this project? Wet sanding can be as scary as using the rotary to some. 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 sanding and polishing will get rid of that as well. 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. If this was a two-stage paint, you would only be sanding the clear coat and the water will only turn milky. Wet sanding makes the surfaces smoother. 3 years ago. If you're sanding out a scratch in the finish, move the paper at a 45-degree angle to the scratch. Automobile manufacturers have been clear-coating since the 1950s, but modern clear coats are harder and thinner than the original lacquer finishes. The reason is because enamels, acrylic enamels, synthetic enamels in general are thicker and they fill the tooth of the sandpaper a lot easier. You don't even need to sand off the Dupli-junk clear coat. You may be wondering if sanding a clear coat is something that you can handle; then, the absolute answer is yes. Add Tip Ask Question Comment Download. 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. 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. Now, let’s talk about Wet Sand & Dry Sanding Techniques When Prepping for Base Coat Painting. Keep the surface moist while you're sanding by frequently spraying it with water. Sanding and polishing clear coat overspray. Start by liberally spraying an area a couple of square feet in size with your water-filled spray bottle. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. I spent 13 hours on this car to get it primed up, finish all body work and ready for paint. 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. It took a long time to get to this point and there is so much left to do. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. Apply rubbing compound directly to a terry cloth rag and buff in a circular motion to remove any signs of sanding. In this video I am going to not only show you how to repair peeling, chipped or worn out clear coat. Remove the sandpaper from the water and wrap it around a sanding block. The clear says it should flash for 25 minutes. You can perform wet sanding once or refine the enamel with successive sanding. Also, be sure to add a pump or two of liquid soap in your water bottle to help glide over the surface. You need to wet sand clear coats with very fine sandpaper. Thanks for the article. The clear coat should be wet-sanded with 400 grit sandpaper. Do not spend too much time in one area; you need to take off only the clear-coat layer. 4 Once you’ve applied the fresh coat, leave it for 24 hours to harden. 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? Although it can be time consuming, color sanding will give your car a mirror-like finish. Colors take a little longer. If the surface is relatively pristine and you wish to remove the clear coat, start wet sanding using 1000-grit sandpaper. Then take painters tape and tape off the area where you will be working. Examine the surface for signs of wear-through before you continue. If you are getting color in a two-stage paint, that means you sanding through the clear coat and have damaged the finish. Here I'll show you how to sand down the sags to a smooth surface and then repaint. 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. It is often a step in polishing cars and other items. Their experts do a fine job and thus have many satisfied customers. Wet the area you're going to sand by spraying water from a spray bottle. I would not recommend dry sanding. 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. Use an 800 grit sandpaper to sand the clear coat down and leave a surface area that is roughened up. If you find damage, use 400-600 grit sandpaper and an orbital sander to wet-sand off all of the old clear-coat. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. 1200-, 1500- and 200-grit wet/dry sandpaper. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. today we debunk the myths and shed the fear! Lack of sanding could make clear coat peel, but that's not your problem. Spray the paper itself, then start gently sanding the body of the vehicle. Here I'll show you how to sand down the sags to a smooth surface and then repaint. 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. When the water begins to turn milky, stop sanding, wipe off the surface and dry it with a blow-dryer. Wet sanding will turn your new enamel paint job from a spotty, uneven mess into a glazed finish that will make your car gleam. A sanding block soak a sheet of the vehicle s important to start wet sanding once or the... And home design trades since 1975 few, so do n't want to sand off the surface moist while 're! Your base has any metallics in it, you will be working can perform wet any. 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