Turco Rust Converter Size: 500mL or 1L The Ultimate Metal Care System Turco Rust Converter is a liquid, water - thin metal surface preparation which, when applied to rusted metal, changes the rust into amorphous iron phosphate. This produces a hard, graying surfaces that serves as a solid base for primers and paints to firmly adhere. Mixing is not necessary because Turco Rust Converter comes straight from the bottle in the exact strength for use. On rusted surfaces, remove loose rust and scale by wire brushing or sanding. Apply Turco Rust Converter by brush, dip, spray or swab then let dry overnight. Level the surface by sanding lightly prior to painting. On new metal, pre-clean by removing excess oil or grease with mineral solvent. Apply spray or swab then let dry overnight. Level the surface by sanding lightly prior to painting.