A biodegradable, acidic detergent which removes oxides, tarnish, rust, scale, oil, and salt-water encrustments from brass, iron, stainless and plastic parts. This solvent meets FDA, USDA, and various mil-spec requirements. The acid can be diluted to about 25% strength; at that concentration, most scuba parts will be cleaned by a 3-15 minute submersion, depending upon the degree of contamination. For heavy encrusted items, the cleaner can be applied full strength directly with a brush or swab. Rinse the finished parts with cold, then warm water and dry thoroughly. A metallic luster can be produced on many clean parts by wiping them with a towel. NOTE: This solvent is primarily a food grade acid, but protective gloves and glasses should be worn during its use, especially when applying it by hand in undiluted form. DO NOT USE IN ULTRASONIC CLEANING MACHINES; it can corrode/etch the tank or damage the circuitry. Ships HAZMAT at additional cost.