RedRollingRoadblock wrote:
I would contact a propane dealer, tell them your concerns and let them inspect it and make recommendations. A RV dealer likely would just R&R the tank.
I will second that advice.... And after a proper inspection by a qualified professional (NOT a gas station pump jockey but someone who certifies portable tanks at the minimum) you will likely find the advice to sandblast and re-paint is what is suggested.
Propane tanks are quite robust. Takes a lot of rust to damage them. Serious pitting in fact.. They generally do not need replacement. Just paint.