This ia a great product to remove stains and rust from knife blades and to provide protection. -- One product... many uses. Metal, Plastic, Fiberglass, Glass, Corian... This is Flitz's signature product. The one that launched their company over 30 years ago. A concentrated cream, Flitz Polish is unsurpassed in its ability to Clean, Polish, Deoxidize and Protect. Tough, durable protection; Non-abrasive formula; Non-toxic; Non-flammable; USDA authorized; Protects up to 6 months in fresh water; up to 3 months in salt water. Use on: Brass, Copper, Silverplate, Sterling Silver, Chrome, Stainless Steel, Nickel, Bronze, Solid Gold, Aluminum, Annodized Aluminum, Beryllium, Magnesium, Platinum, Pewter, Factory Hot Gun Bluing, Painted Surfaces, Formica, Cultured Marble, Corian, Glass, Plexiglas, Plastics, Fiberglass, Eisenglass, and Armatel. Easily Removes: Tarnish, Rust, Water Stains, Chalking, Lime Deposits, Heat Discoloration, Lead and Powder Residue, Oxidation, Bugs, Tar, Oil, Fingerprints, Tree Sap, Bird Droppings, Graffiti, Dyes, Black Streaks/Scuff Marks. Not for: Electroplated finishes.