Todays car bodies are made with galvanized steel and if i remember correctly 10 years before most mid to higher segment car makers used to offer 'Anti-rust warranty' on their cars.
Galvanizing has become norm across the industry and now no car makers makes special mention of the same.
Inherently the car bodies are rust proof, the only areas that are still prone would be accessories attachment points.
Personal preference for the same has been two fold.
-it gives an extra layer of protection from road scars(like under body scratches) and
-it has given a subjective feeling of road noise deadening.
p.s- sorry for taking this thread off topic.Let stick to the same hence forth.
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