The epoxy would fare better than single stage. After fully cured (about 3 months) the epoxy gets pretty hard.Epoxy being so nice to sand led me to paint over with single stage. I was concerned the epoxy would get scratched with rocks and the like.
My opinion is nothing beats it for frames, engine bays, suspension, etc. I also use it for farm equipment, trailers, etc.Is that common in automotive refinish? I've never heard of it being used. And is it necessary? Doesn't epoxy provided all the protection realistically that a vehicle needs? I can see using something like that in a saltwater boat or environment but being that it's not common for refinish tells me there is no need for it. Your opinion?