MIL-PRF-24712A, MILITARY SPECIFICATION: COATINGS, POWDER (25 MAY 1995) [SUPERSEDING MIL-C-24712]., This specification covers powder coatings for interior steel, aluminum, copper-nickel and bronze equipment, furniture, and electrical box surfaces and on exterior steel, aluminum, copper-nickel, and bronze surfaces exposed to marine atmosphere, high humidity, seawater and weathering.