The same MIL specification dated 23 February 1955 that implemented the Gull Gray/White paint scheme changed the paint scheme of target towing and drone control aircraft. From Elliott, Volume 3:
The fuselage, cowling, and engine nacelles on multi-engine aircraft were Engine Gray except surfaces extending into the topside of wings. In this case, these surfaces were painted to match the wings. The horizontal stabilizer, elevators and vertical fin were Orange Yellow. The vertical fin fairing was painted to match the fuselage. The Orange Yellow terminated on a line formed by projecting the fin leading edge down to the fuselage. Wing walkways could be either Engine Gray or, in the case where the wing is utilized to enter the aircraft, they could be antiskid black material. The rudder was painted Insignia Red. Insignia Red bands three feet wide encircled the wing panels. On single-engine aircraft, the bands were located one-third the distance from fuselage to wing tip, with the center line parallel to the thrust line. On multi-engine aircraft, the bands were located midway between the national aircraft insignia and the engine nacelle with the center line of the bands parallel to the thrust line. However, in the event there was insufficient space to locate these bands as specified above they could be located adjacent to the outboard nacelles. The national aircraft insignias could overlap the wing bands, but the bands could not overlap the insignia. The national aircraft insignia could not be altered in size or location to accommodate these markings.
In August 1959, florescent Red-Orange replaced Insignia Red and the entire vertical fin was to be red.
Florescent paints weren't very durable, so in May 1965, they were replaced with International Orange.
More later...
