Grinding and Sharpening: In metalworking, sandpaper is often used for grinding and sharpening different steel applications and surfaces. Coarser grits, like 36 or 60, are used to remove material and shape the steel. This is especially beneficial for reshaping or sharpening blades, chisels, or other cutting instruments. Sandpaper is a https://x.com/hongyuxin20/status/1816704500142379260