Diamond Luster Restoration Cream cleans water spots on glass, porcelain, tile, chrome, stainless steel and aluminum. It is an excellent product for restoring the luster and brilliance to your shower doors, faucets, sinks and counter tops. This product is wonderful at restoring the clarity to your windows especially if they are damaged by sprinkler over spray/hard water spots. It works great on automobiles, boats and RV's too! (DO NOT USE ON PAINTED SURFACES) Made in the U.S.A.