![]() Both grits are great for removing light clear coat scratches that can’t be removed by rubbing compound and buffing. Wrapping the sandpaper around the block will help to make sanding more even.Įven though the 1,200 grit is a fine sandpaper, it will still leave scratches that should be removed with 1,500 or 2000 grit before applying a clear coat.ġ,500 grit and 2,000 grit are used to sand the clear coat. I find that “wet sanding” cuts faster and doesn’t clog the sandpaper. I usually add a few drops of dish soap to make it more slippery. Wet sanding is when you soak the sandpaper and spray the surface with a lot of water. It is important to use the “wet sanding” technique. You can use 1,000 grit or 1,200 grit over the base coat to remove imperfections. Start with 600 grit and work your way up to 800 grit. Also, avoid spending too much time on one spot.Ħ00 grit and 800 grit are used to sand imperfections in the primer before the base coat/paint is applied. It will help you evenly distribute hand pressure across the sandpaper making it easier to sand curved surfaces. Block sanding is when you wrap the paper around a backing pad or a block. To avoid waves and fingerprints, use a sanding block. With this in mind, you want to spend most of your time preparing the surface. Every little imperfection will get magnified once the paint is applied. In this step, the goal is to make the surface as flat and as smooth as possible before primer application. ![]() 400 grit will work for fine sanding spot putty and for rough sanding a primer although, I prefer 600 grit for that. 320 grit is great for the final sanding of body filler or spot putty. 180 grit can also be used to remove light rust with minimal scratchingīoth grits are usually used for sanding before primer. 180 grit is great for feathering the edges of the body filler and sanding the spot putty. So, start with 40 grit, then 80 grit and to even it out 120 grit.ġ20 grit is not as rough and is great for flattening out scratches from heavier grit. If you are using a cheap filler, it will take you a while to sand it. The better the quality the easier it will be to sand. Of course, a lot depends on the quality of the body filler. So, use it only when you really need it like for removing rust or on very deep scratches before applying body filler/bondo.Ĩ0 grit works great for shaping body filler. This is very coarse sandpaper that will leave rough sanding marks. I use 40 grit for very rough sanding/grinding before doing the bodywork. For tough jobs, like stripping the paint, you would need lower-grit sandpaper, and conversely, for clear coat repairs, you would use higher-grit sandpaper. The grit used depends on your repair project. The lower the grit number, the rougher the paper. ![]() Sandpaper “grit” refers to the number of abrasive particles per square inch of sandpaper. Big mistake! Sandpaper under 1,500 grit is too rough for the clear coat and will leave small scratches. I saw some people saying that they’ve used 600-grit or even 400-grit sandpaper to repair clear coat scratches. There are a lot of different contradictory information online that can be very confusing and overwhelming, especially for beginners who have never done any repair projects before.Īfter reading some of the posts, I found out that a lot of car enthusiasts are using the wrong grit. It is important to choose the right sandpaper grit for each task to avoid paint damage. “What sandpaper grit should I use?” is one of the most popular questions on every auto forum. ![]()
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