$5 worth of quarters at the car wash after snowy roads, or lots of mud and I've never had issues with rusty truck bodies/other parts.

See lots of fairly new pickups with rust bubbles starting on the bed above the rear wheel openings. Figure those are people too dumb, cheap or lazy, to keep stuff from accumulating there and eventually causing problems?

If three or more people think you're a dimwit, chances are at least one of them is right.