Once You grind and polish stone by hand, you use sandpaper with grits of various coarseness. Sandpaper has lots of uses during the Do it yourself sector, but its Main use will be to condition and sleek tough edges and surfaces on various goods made of Wooden, stone, or metal. https://www.quora.com/profile/Trevor-Flatcher-2/Advantages-and-Challenges-of-Silicon-Carbide-Specialty-Ceramics-Macrocosm-Materials-Company-Overview-Founded-in-2016-1