The safer, acid free rust remover. Removes rust, not metal. Leaves metal clean and ready to paint, plate or powder coat. Suitable for engine parts. Will not harm copper, brass, aluminum, solder, lead, plastic, rubber, seals, wood or vinyl. Will not remove sound paint or chrome. Removes blueing and other oxide coatings. Works as long as surface remains wet. Derust small parts in a plastic container larger parts can be placed in the discharge stream of a small pump. Virtually any plastic pump will work. Irrigation hose can be used to assure complete coverage. One quart derusts about 5 square feet.