Grinding And Sharpening: In metalworking, sandpaper is often used for grinding and sharpening different metallic equipment and surfaces. Coarser grits, like 36 or 60, are used to get rid of material and form the metallic. This is very beneficial for reshaping or sharpening blades, chisels, or other cutting equipment. Sandpaper https://www.pinterest.com/pin/1001488035878384911/