Instantly removes heavy tarnish without rubbing. Use indoors or out. Natural Organic salts formula. Safer than traditional acid-based cleaners. Just spray & rinse. Product will continue to work on the surface until rinsed. You MUST rinse the surface with water after application and neutralize the formula to prevent and encroachment on the surface itself. After the surface is cleaned you must follow up with a polish or wax to keep it from quickly re-tarnishing. PLEASE NOTE: This product is a tarnish/oxidation remover only. It is not a polish. Not for: Chrome or Patina finishes. If you have an oil-rubbed faucet or hand-hammered copper sink that has had an artificial patina applied, DO NOT use this product on it. This product will remove the patina! Instantly removes: Heavy tarnish & oxidation Rust & corrosion Calcium deposits Water spots & stains Safe on: brass & copper, glass aluminum, painted surfaces fiberglass. stucco brick, porcelain How to use: Spray on Rinse thoroughly with lots of plain water to neutralize the organic salt formula.