I'm sure this has been asked before but I couldn't find anything with a search. Should the fender and quarter extensions be painted on or off the car? Looks to me like the factory painted with them on, correct?
The factory painted them off ... thus the reason for the paint behind them. When going for a re-paint, I'll usually leave the 1/4 extensions on, but paint the fender extensions (headlight doors) off, as they will go on and off when if you change headlights, possibly exposing non-painted surfaces if they didn't line up exactly perfect from the time before. On my daughter's '69 we left the headlight buckets in, since they don't ever come back off.