Blue Gold has been tested to ARP 1755 with results proving it safe to use on ferrous and nonferrous metals. It has been tested safe on unpainted and painted surfaces and plastics to AMS 1530 spec. In a United Air Lines Interior Cleaning test it had no adverse effects on natural rubber, silicone rubber, electric wiring insulation, neoprene, leather, vinyl, plastics, naugahyde, kydex, polypropylene, polyplastex or wool, nylon or acrylic carpet.