And you apply the fluid film again next year at this time. It needs to be done yearly

A lot of folks don’t take the spare tire down..for years..if at all. It’s gets pretty rusty in that area

Had a Chevy truck for about 10 years on Outer Banks. Constantly in salt air. Started rusting in middle of the roof, and of course the tailgate. Used a small burr on a Dremill tool to get back to clean steel, then painted with white rustoleum. Worked well.

I rotate my tires every 6000 an use donut when do it, so i take spare down, I rember change a tire early am in rain an ho winds. Along 4 lane. Not fun, I have spotlite just for such purpose plug into adapter, there is some stuff close to donut a plastic box or 2 them above metal box for emmision an has lines go to tank, I spray that an donut rim an above very good. Bad rust, as start in edges bad by metal thinner frame by front suspension by kingpins upper an lower, got drive shaft oil, my fuel pump base above tank rust out year an half ago, prettner $700 on fuel pump , $400 for pump , why Chevy rust so bad ? Also heard Toyota do, other rust, I don't have much against gm