Epoxy frustrations..

[nsb29]

I knew Robert would help you figure it out I was Leaning more towards a problem with your material Or the application of it. Why don’t you just hit the whole fender with some 320 to get rid of your big scratches and reshoot you’re problem areas, then go with your high build Inside your recoat window, don’t see any reason to keeps sanding but do like Robert Recommended for sanding when you get to your high build

[Marty68]

always learning from you guys... if this was mine I would THOROUGHLY sand with 220 mix up some spi epoxy only in appropriate temperatures. and put 2 coats on let sit over night and move to high build

[pontgta]

Originally Posted by nsb29

Corners and edges are always the hardest to get paint on and it’s where it’s always the thinnest. what brand epoxy are you using? How many coats are you applying

This is so true. I now epoxy, then shoot 2 coats of high build primer. If you have to sand the edges, go with the grey pad, and only do light pressure.
I think you are trying to sand too smooth before you apply the high build. Wait until you have enough high build on the panel, then sand.