DERUSTING (RLN-27) DERUSTING SOLUTION is a Liquid Acid, Surfactant, and Corrosion Inhibitor based product primarily designed to simultaneously clean and remove rust from steel and iron parts. This product is also effective in removing flux, heat scale and other oxides from steel, stainless steel, cast iron and aluminum in immersion and hand-wipe cleaning applications. DERUSTING SOLUTION is also suitable for preparing steel and aluminum surfaces for painting in immersion (Vat) or hand-wipe applications. Use of DERUSTING SOLUTION for cleaning, rust removal or pre-paint preparation must be followed with a fresh water rinse and drying. If used prior to painting, parts should be painted after the drying step.