MIL-DTL-24631/7(SH), DETAIL SPECIFICATION SHEET: PAINT, POLYESTER URETHANE, BLACK, NAVY FORMULA 187, TYPE II (06 JUN 1997)., This formula covers polyester urethane paint, MIL-DTL-24631/7, type II, Navy Formula 187, Black RW 1.8, Type II for exterior use as a highly flexible, weather resistant topcoat. The paint shall consist of the ingredients specified in the quantities specified.