GranQuartz now offers MB20 Polish Powder, an exclusive proprietary blend of abrasives and polishing agents that polish granite and most other stone. The polish is for use with a variable-speed right angle grinder with a 5- or 7-in. pad driver and a natural fiber pad. Only a small amount of the polish is required and areas being polished should be masked off and free of any coatings, waxes, sealers, grease or soil.