Rust-Oleum Rust Dissolver Jelly, 8 oz: Quickly penetrates metal surfaces to dissolve rust. Gel spray will cling to surfaces including the most intricate, detailed objects. The powerful, proprietary formulation makes rust removal easy and transforms surfaces to like-new condition. Rust Dissolver Gel also inhibits the return of rust and creates a smooth surface that is ready for painting. Medium to light rust dissolves in 10-30 minutes or less, while heavier amounts of rust may require a second application.