Is that a dent or an intentional dimple in the drive side chain stay? There is the intentional linear dimple to provide chainring clearance, but I'm asking about the circular dimple ahead of that.

Did you spray over the top of the old finish? I think I see a place (an irregula low spot) where the original paint was scratched off but the primer did not refill. This is where you want to sand and spray and carefully re-sand until to get to a smooth surface.

The primer coat seems fairly thick, overall, yet you missed in a few places, such as covering the braze for the bottom bracket cable guide, the drive side rear dropout,....

It looks a lot like a Bob Jackson except for the seat stay ends and (possibly) the lug cut outs.