CROWN BRAND solid polishing compounds can polish copper surfaces like cookware, utensils, decorative articles and many other objects. Below are the quick copper polishing compounds: 10x Gray Yellow: It is used to eliminate Deep Sanding Marks of 325/400 Grits Effectively. CM-22-Blue: It is used to eliminate Sanding Marks of 600/800 Grits Effectively. 4025-White: It is used to remove Pre-Polishing Marks, Signs of Wear & Tear & Make the Article Ready For Planting. P-527-Yellow: It is used to remove micro scratches and remove burn marks & make brilliant mirror reflecting surface.