ext. metal door has a very smooth finish primer coat . has been painted many times and now the outer paint coat is chipping and not adhereing to primer coAt . what shold be done to stop the chipping of the finish coat of paint ?
What primer and paint did you use? The primer is adhering but not the finish coat correct? How much time elapsed between the primer and finish coat? Did you race the finish coat, for example? Or leave the primer on long enough for it to pick up a surface layer of film before painting?