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 .
Make no mistake, there ain't no powder in this Puff ! And... I'm not really a crazy person but I play one in real life