Silicon Carbide Sandpaper
Usually blue-gray or black in color, it can be used on wet or dry surfaces and is ideal for sanding metal, sanding between coats of finish, and polishing smooth surfaces. It is less likely to clog than other sandpapers, and it provides excellent results on metal, plastic, and fiberglass.
Correspondingly, what is black sand paper called?
Silicon carbide sandpaper is a synthetic paper that is blue-gray, black or charcoal, often with a waterproof backing. It can be used on wet or dry surfaces. Its friable surface will self-sharpen on harder materials, making it the best sandpaper for metal and plastic.
Moreover, what would you use 120 grit sandpaper for? For heavy sanding and stripping, you need coarse sandpaper measuring 40- to 60-grit; for smoothing surfaces and removing small imperfections, choose 80- to 120-grit sandpaper. For finishing surfaces smoothly, use a super fine sandpaper with 360- to 600-grit.