[dsraven]

Yup, filler over the epoxy, scuff it first if more than a day later for tooth. Then when the filler work is done spray the high build. Block with a long stiff board to only hit the high spots and not conform to all the low spots. Dont sand through to steel just to the epoxy as a last resort. If you have spots that didnt get touched by sand paper then they are the low spots. Lay a straight edge across those and decide if you will fill those more or keep laying coats of high build down. It's why a lot of guys lay a slim coat of filler on the whole fender or door or whatever. They sand down the highs and the lows will likely be filled already. Then the blocking process takes less time and less coats.