MIL-PRF-24635C, PERFORMANCE SPECIFICATION: ENAMEL, SILICONE ALKYD COPOLYMER (06 JUN 2003)., This specification covers copolymerized silicone alkyd enamel for use on primed, smooth metal, glass reinforced plastic (GRP), wood and plastic/composite surfaces. Enamels to FED-STD-595 color numbers 26173, 26270, 26373 and 26008 qualified to this specification are low solar absorbent (see 3.6 and Table VI). Two of these enamels (color numbers 26008 and 26270 to FED-STD-595) may also be qualified to this specification with anti-stain properties (see 3.7).