Okay I finally made some progress. The inside and outside of the parts all have 2 more coats of epoxy primer. I'm very happy with how it turned out. These will cure for a few weeks and then I'll sand with 400 grit and paint them! Finally!!
Now need to finish the bumpers, then the main shell. Same deal, inside and out, undercoating, etc. I'm finally getting the hang of laying down the paint with going too heavy. I found that a super thin first tack coat, then wait 20 mins, then do a medium wet coat, then wait 45 min, then do a heavy wet coat.. that worked. Very well for me.