White vinegar is effective for removing rust. Treat highly rusted parts and tools with a mixture of salt and white vinegar by means of spraying, soaking or submersion.
Completely remove rust from metals by first disassembling and cleaning the object to remove caked-on dirt and debris. Mix a solution of one part salt to 16 parts water in a plastic container and completely submerge the rusted metal object in the solution. Allow the rusted object to soak for at least 12 hours or more if necessary. Thoroughly rinse the object in soapy warm water and then scrub the remaining rust away using a wire brush or steel wool. Treat the object with a rust-preventing agent.