A car can expire from rust. Although newer models withstand rust far better than older ones, no car is totally immune. Driving a car in a humid environment makes it even more vulnerable. Additionally, ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? An ominous brown stain on the fender. A bubble in the paint at the bottom of a door.

Rust. It’s the four-letter word that has sunk more secondhand car transactions (and broken more post-purchase inspection hearts) than any other. It’s the cancer that eats away at the very skeleton of ...