I was just adding to your comment :)hope you didn't mind
This is very true. I should have said, filler over 2k is to be done at your own risk.I wouldn't recommend filler over any paint ^yes its true about 1k paint but 2k can give you problem as adhesion from filler to paint so best to feather the paint out as much as possible that you think you can do the repair with out filler over existing paint however you can use a 1k stopper or putty on top of primer for say like pin holes and scratches
Not at all, every bit of advice helps