Paint / refinish Distributor

That is correct. They were not bare unpainted iron left to rust, though many of them did eventually rust despite the paint.

Krylon satin black is a very close match to the stuff Prestolite originally used, only with better durability.
Dan, if you have a need, try John Deere satin black. It is superior in my book. I believe it is made by Martin Senour. Tmm