Grinding And Sharpening: In metalworking, sandpaper could be used for grinding and sharpening various steel applications and surfaces. Coarser grits, like 36 or 60, are used to get rid of material and form the metallic. This is especially helpful for reshaping or sharpening blades, chisels, or other cutting instruments. Polly https://www.quora.com/profile/Trevor-Flatcher-2/Understanding-the-Chemical-Stability-of-Silicon-Carbide-Special-Ceramics-https-www-macrocosmmaterial-com-news-Underst