Here is the only reference picture I had to go by so a lot of it was guessing on colors and what the covered up partial words were. But I did do some research and they could be feasible.
This was the drivers service station.
And this was his teammates car. Only the rear fenders were a color other than black on this one but seem to match the rear fender color of the 21 car.. The trunk, roof and hood were black on the 14. I think the driver wanted to match the color of the Amoco logo which was red and black back in 1940.