Grinding And Sharpening: In metalworking, sandpaper may be used for grinding and sharpening numerous metallic instruments and surfaces. Coarser grits, like 36 or 60, are used to eliminate material and condition the steel. This is particularly useful for reshaping or sharpening blades, chisels, or other cutting applications. (Be aware that https://www.quora.com/profile/Trevor-Flatcher-2/Advantages-and-Challenges-of-Silicon-Carbide-Specialty-Ceramics-Macrocosm-Materials-Company-Overview-Founded-in-2016-1