Metal Buffing Polishing Kit for Drill - Stainless Steel, Iron and Aluminum (4 Inch Wheels) Transform your drill to a Buffing / Polishing Machine For all Metals 3 easy steps for polishing metal. such as Stainless Steel, Iron, Aluminum and other hard metals Step 1: #1 Black Buffing Compound in combination with yellow hard wheel for heavy duty cleaning and oxidation removal, If needed. Step 2: #2 Grey Buffing Compound in combination with yellow hard wheel For first cut and scratch removal. Step 3: #5 White buffing compound in combination with white soft wheel for a brilliant high gloss finish of the metal surface.