A rust removing soak that safely removes tough rust from metal parts and tools. WD-40 Specialist® Rust Remover Soak quickly dissolves rust and restores tools equipment and surfaces to bare metal without chipping scraping or scrubbing. Great for removing rust from tools metal cast iron chrome parts and more without harming paint gaskets trim or other surrounding parts. This rust-removal formula has no toxic fumes does not use acids or caustic chemicals is non-irritating to skin and is safe to use on most metals. To remove light rust leave parts in the solution for 1-3 hours. To remove heavy rust leave parts in the rust removal solution overnight. Do not use on parts that have bluing browning or protective oxide paints as those protective coatings would be removed. * Ideal for use on auto restoration tractors antiques farm equipment & implements trailers & hitches and rusty tools * Non-Irritating to Skin * No Toxic Fumes and Acid Free * NSF Category P1 (#146753)