I see I had some inputs on the thread that Dan Chev4T6 pointed you to. As a follow-up, here we are nearly 2 yrs later and my paint job STILL looks great. Just make darn sure your filler sanding job is good. By "good" I mean, "like how you'd do it if it were a fender or a door." I didn't do a good enough job and (naturally) the paint shows my lack of attention.
But the epoxy filler and the paint worked out wonderfully. Be sensitive to "operator error"!
BIll