As far as I can tell, (haven't cleaned the outside yet) the paint is right into the divots, and I think the paint is original, but not sure. Pretty sure whoever repaired/fixed up this truck originally did do some painting. The paint on the non-original doors pretty much washed off in the weather, and when I wiped down the floor with wax/grease remover the paint comes off.
I'll have a closer look tomorrow. Maybe do a little scrubbing with lacquer thinner.
BTW, the previous builder(?) did a really nice job of finishing the cab corners, but unfortunately, the fiberglass over the balled up newspaper just couldn't hang on. Can't wait until I strip what looks like 1/2" of bondo off the doors!