Mine was a paint job too, my first one not using rattle cans.... OT VW Bug, sanded that puppy smooth, primed it with red oxide primer I bought at the parts store. Bought the baby blue at NAPA, one gallon of enamel and a gallon of thinner. Paint turned out great for a first timer spraying outside, didn’t even get any bugs in it! Started putting body back on the frame about a month later, noticed some bubbling, wtf? Car sat thru the winter before I could get back to it, by that time, the paint was coming off in huge strips. Went back and looked at the primer I had bought, it was Rustolem oil based primer for their paint. The NAPA automotive paint didn’t stick to it, it eventually almost all peeled off leaving that red oxide primer. Was still like that when I sold it, unfinished. I just couldn’t get the urge back to put it back together. That Rustolem will stick to anything, but nothing would stick to it but their paint.