David,

You give the indication in your posts that you want to go back to the original lighter blue color (Windsor Blue, in 1950) that apparently is under the darker Blue (looks like a Mariner Blue) paint that is now on your truck.

Is that right? Windsor Blue is an original 1950 color. That 1947-1952 color, and the later 1953-1955st Transport Blue, were quite common on Advance-Design trucks I saw in the south in the 60s.