A question for Colorado residents: My son and his wife recently moved to Denver. They each have late model Subarus. My son told me last night that he doesn't think rust prevention is a big deal there, and his wife, a long-time resident of Fort Collins, agreed. They don't think that a lot of salt is used on the roads. They both said that they don't see a lot of rusty cars there, but I wanted to check here with those who have had some experience in that part of the country. My son and I are from the Carolina piedmont where it snows a bit but not much.