Wet sanding, also called color sanding, is the process of sanding away a certain measure of the Vehicle Clear Coat in order to improve or fix severely defective paint, and/or random isolated deep scratches. After the sanding has been done, a heavy cutting polish is applied to bring back the gloss and shine. Then a wax, sealant, or ceramic coating is applied in order to protect and visually enhance the paint. It’s called “wet sanding” because as the sanding process is happening, there must be some source of water or lubricant sprayed on the paint and sandpaper in order to wash away the sanded clear coat residue. This way, the sandpaper does not get clogged up with dirt and residue while the sanding is happening. Wet sanding paint is done with very high grade, fine sandpaper such as 1000, 2000, and 3000 grit.