MIflyer
1st Lieutenant
I believe the ailerons were fabric covered, and therefore the paint had to be compatible with the fabric and dope process. It was common for even high speed aircraft to use fabric covered ailerons, rudders, and elevators. Meanwhile, the contemporary Ercoupe had all metal ailerons, elevator and rudder, but with fabric covered metal structure wings..Interesting, lemon-yellow
Interestingly enough, the F4U had wooden fabric covered ailerons and partially fabric covered outer wings