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® Fiberglass® and Armatel®. 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