Grinding And Sharpening: In metalworking, sandpaper is usually used for grinding and sharpening numerous metallic tools and surfaces. Coarser grits, like 36 or 60, are used to get rid of material and form the metallic. This is very useful for reshaping or sharpening blades, chisels, or other cutting equipment. Now https://x.com/hongyuxin20/status/1818178462718501187