Thus, Black silicon carbide may be finest used repeatedly, including in a very rock tumbler. Merely retain introducing new coarser grit, and because the media breaks down, it'll produce a "Doing the job Mix" of particles. Extra Fine Grits (400 �?600+): More great grit sandpaper is used for ultra-easy https://www.quora.com/profile/Trevor-Flatcher-2/Advantages-and-Challenges-of-Silicon-Carbide-Specialty-Ceramics-Macrocosm-Materials-Company-Overview-Founded-in-2016-1