Paint advice needed

I trust epoxy primer more than any other primer when painting over anything that seems sketchy. I've painted over factory and respray paint with it and I've yet to have a failure but I've only done this about 3 times so far. It's always a crap shoot but I don't think the odds are high that you're going to have an issue either as long as you prep it correctly. I personally wash with Dawn soap, then use wax and grease remover and then hit it with 70% isopropyl alcohol and a tack rag before spraying epoxy. No issues so far.

You may have issues with the manufacture approving you to paint over anything other than what they recommend because of liability reasons.

Thank you. I appreciate the input. I think I have a plan now. I've got some areas like the inner deck lid that are mostly bare metal with some small spots of factory paint. I'll likely shoot some epoxy over those areas. Then there are windhsield and back glass channels where I've cleaned and scuffed to prep for paint and have spot primed any sanded-through spots with etch primer. I'll use a urethane sealer over those, then shoot color over each.

Any idea how much single stage paint I'll need for a trunk, inner deck lid, door jams (body and doors), and windhield/back glass channels? Will a quart suffice, or should I get two to be safe? I have no idea. The color will be WW1 white, going over gray epoxy/sealer.