Thinking of replacing ASME propane tank

Thanks for all the replies. I do clean, scrape & rustproof/paint much of the metal underside as needed, usually just the back end. When I do scrape & clean it it does have some 'pitted' spots, just not sure if that is the coating or tank. The shield is still decent.

I've talked to several rv repair shops & propane shops & none would deal with it.