Brownie/Greenie/Supergreenie are silicone polishers used on precious metals and amalgam. Use Brownies to achieve a smooth surface, Greenies for a lustrous polish and Supergreenies for a super-polish. Silicon polishers impregnated with high quality abrasives Use Brownies for pre-polishing, Greenies for polishing and Supergreenies for super-polishing Use for amalgams, precious alloys and nonprecious alloys.