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.