[defen]

Sounds like good advice, but I'm really curious about your use of the term "rust belt". It refers to a geographic region that once had strong industrial output, but has suffered economic decline as those industries have become less important/relocated off-shore. It doesn't have anything to do with the propensity for metal to rust in those areas. Unless there's some other usage that I've never heard before.

[falcolas]

I would think GP refers to any city in the north of the US, where we get enough snow to justify salting the roads. That road salt takes a very harsh toll on vehicles, causing an enormous amount of rust on the undercarriage.