SM-5679 Rust Converting Cleaner is a rust converting metal pre-treatment for paint. In addition to killing and converting rust, SM-5679 etches and cleans steel surfaces. It is designed to be used as a metal pre-treatment which readily penetrates rust causing it to chemically change from iron oxide (rust) to iron phosphate (black iron), a substance which turns the metal black leaving an excellent temporary protective coating on the surface. After pre-treatment of the metal with the Rust Converting Cleaner, a recommended Supermarine Paint rust-inhibitive primer must be applied prior to finishing with the topcoat.
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