MIL-PRF-24712, MILITARY SPECIFICATION: POWDER COATINGS (21 FEB 1989) [S/S BY MIL-PRF-24712A]., This specification covers powder coatings for interior steel , aluminum, copper-nickel and bronze equipment, furniture, end electrical box surfaces and on exterior steel , aluminum, copper-nickel , and bronze surfaces exposed to marine atmosphere, high humidity, seawater, and weathering,