It’s recommended that you use the wet-sanding technique when working with 1500 – 2000 grit sandpaper for the best results. Luckily, you can use 1500 – 2000 grit sandpaper to smooth out these scratches and other surface imperfections on the base coat before and after applying the clear coat. 1500 – 2000 grit sandpaperĪs mentioned above, one notable drawback of the finer 1200-grit sandpaper is that it will still leave marks. However, these scratches are relatively easy to remove with 1500 – 2000 grit sandpaper before you apply the clear coat. On the downside, this sandpaper grit range still leaves minor scratches on the car’s surface. Wet sanding involves soaking the sandpaper and spraying the surface with water during the sanding process to prevent clogging. The best way to use these sandpapers is through the wet sanding technique. Also, you can use it to sand sensitive surfaces like plastic. This sandpaper grit range is perfect for removing base coat imperfections. Start with the low-grit end (600 grit) and slowly work your way up to the finer 800-grit sandpaper. 600 – 800 grit sandpaperĦ00 – 800 grit sandpapers are excellent for sanding surface imperfections in the primer layer before you apply the base coat/paint. 400-grit options are ideal for polishing surfaces. In addition, 320-grit sandpapers are commonly used with an electric belt sander or sanding block. However, they are not suitable for removing or shaping imperfections. For that, sandpapers within this grit range are excellent for leveling and sanding the filler before applying the primer. This sandpaper grit range is much finer than the ones we previously mentioned. In addition, you can use it to get rid of light rust with minimal scratching. Instead, it is well suited for sanding the spot putty and feathering edges of the body filler. However, you should not use it directly on car paint. On the other hand, a 180-grit sandpaper is the coarsest sandpaper option you can use on the auto body. Specialists use it to finish off the filler after the 80-grit sandpaper has done most of the smoothening work. 120 – 180 grit sandpaperġ20-grit sandpaper is ideal for flattening out scratches from heavier grit sandpaper since it’s as rough. For instance, you can use it to smoothen out the body filler before applying the primer. This makes it a great starting point for sanding the filler after it has dried out. However, it’s an excellent option for shaping body filler and rough sanding the bodywork to bare metal.Ĩ0-grit sandpaper is a step below the 40-grit sandpaper in terms of coarseness. For that, it’s not recommended to remove minor clear coat scratches and other similar applications. The most common sandpaper grit options you’re likely to encounter in your car project are 40- 80 grit sandpaperĤ0-grit sandpaper is very rough and usually leaves visible sanding marks on the surface. More importantly, this means that there is not just one type of sandpaper grit needed for the job. In short, there are many types of sanding applications in the automotive industry. While high grit sandpapers are ideal for clear coat coats. For instance, lower grit sandpapers are suitable for touch jobs like stripping car paint. The ideal sandpaper grit depends on the repair project you’re undertaking. On the other hand, a higher number shows that the sandpaper has more abrasives, making it finer. A lower number indicates that the sandpaper has fewer abrasives per sq. Recommended car sanding applications for different sandpaper grit sizesįirst of all, sandpaper grit is the number of abrasive particles contained in 1 sq inch of a sandpaper sheet.
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