This is a superb multipurpose Rust cleaner, Penetrator, and Protector. Its Non-toxic, silicone free, ozone friendly formula is Safe for metal as well as it varnishes rubber, plastic and fabric. Technically superior, it is excellent for displacing moisture, anti-corrosion and light lubrication. Applications: Rust penetration & cleaning, degreasing, moisture proofing, restoring electrical values & improving electrical conductivity in make-break systems (contactors, relays, switches...) windings, coils, transformers, insulators, re-opening rusted/jammed assemblies, light lubrication & anti-corrosion. Just spray on your door hinges to make them noise free. Spray it on door latches to remove rust and make them smooth as butter. Use it to clean rust marks on chrome coating of your automobile and see wonderful results. It even removes grease, grime and more from most surfaces.