for heavily tarnished metals use colonel brassy straight out of the bottle. For polished metals and metal requiring just polishing, try diluting with water with up to 1:5 ratio. Always test on small hidden areas on any polished metal.<u><li>Industrial strength hard surface cleaner</li><li>Brass, copper, chrome, stainless steel, aluminum, silver, gold, fiberglass, plastic, porcelain</li><li>For use on/in motorcycles, dirt bikes, oxidation, hard water, hair dye, boats, antiques, atv's & utv's, RV's, golf carts, over spray & rust, adhesives, yellow headlights.</li></u>