... effect20/40mesh30/60meshCarbon steel, manganese steel, stainless steel, alloy metal, glass, ceramic, stone, wood, Serious corrosion, oxidation ... roughness 50-75,60-95 micron80mesh120meshAluminum, stainless steel, alloy metal, glass, ceramic, stone, wood, Surface roughness ... dirt, etc.150meshThe restoration of ancient buildings, metal, glass and ceramic fine polishing, grinding Do fine ...