I paint molding before nailing it in place. Particularly for baseboard, its a heck of a lot more comfortable painting it on a bench, at 36" height, rather than lying on the floor and trying to avoid getting paint on floor or walls. After installing, I have to fill any nail divots, and then give it another coat of paint, but that last coat is fast and easy because I have no cutting (other than perhaps a small bead of acrylic caulk).
But i don't have a spray gun, I do it all by brush. I can see the problem you have with the spraygun. I can't see an option other than brushing the whole thing.
But i don't have a spray gun, I do it all by brush. I can see the problem you have with the spraygun. I can't see an option other than brushing the whole thing.