Saltwater and Rust
On the other hand, I recall that my parents - who live around the corner from a marina - have always kept bikes in the garage, which was left open more often than not. These included my old mountain bike - which was stored in this manner for 15 years before I retrieved it, and the vintage Raleigh we later restored - which must have been kept there for over 20 years. Neither of these bikes show any more rust than is typical for their age. Could it be that bicycles were somehow rust-proofed in the past, and that this is no longer done? Or does rust formation slow down after an initially vigorous attack? Insights from coastal dwellers appreciated!