Flitz Metal Polish Paste will never dry out, has an indefinite shelf life, is non abrasive, leaves no messy residues, non toxic and environmentally friendly. Flitz Polish Paste is a concentrated cream that is unequaled in its ability to Clean, Polish, Deoxidize and Protect Brass, Copper, Silverplate, Sterling, Chrome, Stainless Steel, Nickel, Bronze, Solid Gold, Aluminum, Anodized Aluminum, Beryllium, Magnesium, Platinum, Pewter, Factory Hot GunBluing, Painted Surfaces, Glass, Plexiglas(R), Fiberglass(R) and Armatel(R). 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 and Black Streaks. Provides Tough, Durable Protection up to 6 Months in Fresh Water and up to 3 Months in Salt Water. Non-Abrasive Formula. Non-Toxic and Non-Flammable. USDA