I don't believe the inside of the bed rolls were even painted at the factory, other than what could be sprayed in from the ends.
Your plan of swabbing with a rag would get it painted, although you might use something like a sponge, which would get more paint where it needs to go and not all over the place.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.