Useful, too - There were 18 aircraft in a squadron, and they flew in section VICs of three, each denoted by a specific trim color. All the planes in the section had the wing chevrons, but only the section leader had the fuselage band. The right-hand aircraft in the VIC had only the upper cowl trimmed in the section color, while the left-hand aircraft had only the lower cowl colored. So everyone could be readily identified on prewar flybys, and the party responsible for any screwups could be promptly given the individual counseling that the USMC is justly famous for.

The weathering is minimal because I am absolutely certain that these prewar machines would have been maintained impeccably.