I wish I could answer this question. My tank is relatively new and the outer surface has an epoxy primer coating on it. All I know is that from welding the smoker parts on the inside, the epoxy primer on the outer surface has essentially turned to dust. Likely it would but that won't negate a thorough cleaning .
That is a1952 Harley Davidson. First year of the foot shifter and hand clutch. The side car was a rusted pile of junk before restoration. The back end and axle had been lying in a mud pit for quite sometime.