doesn't look too bad...BUT i wouldn't wait any longer to do something. at least get some oil on it & rub it down to get some of the rust off. i see alot of surface rust but a little piting too. there is a company called " Frontier" that makes a scrub pad that works real well at removing rust & dirt without effecting what little finish is left.
( Big45metalcleaner.com) that should buy you some time to get it to a pro for evaluation. good luck
ddp
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