Grinding And Sharpening: In metalworking, sandpaper could be used for grinding and sharpening several metal tools 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 applications. Lasers https://www.pinterest.com/pin/1001488035878259581/