Because I am going to keep the car on the road as long as possible. Like 10-15 yrs +, and I'm sure rust will eventually set in. I drove my 93 Suzuki Swift for 12 yrs with 176,000 miles on it and the body is toast. The salt they use on the roads up here after time will take its toll. If not, then at least I have peace of mind. I've read that most new cars used galvanized sheet metal and that the metal its coated with a rust protectant, but then I've seen new cars ,less then 10 yrs old with rust on them up here, so somethings not working somewhere. I'd rather not have to do it, but I know what the salt does. I guess I'm just paranoid with rust. I restored a 72 VW bus and replaced half the body with new sheet metal because of rust. Maybe that wont happen with the Vibe, but I havent been able to confirm online whether or not the Vibe definately was built with galvanized sheet metal, unless someone else can confirm it. Also, I've read posts on here where some already have rust on their 2-3 yr old vibes (that didnt help). I've seen places on my Vibe with missing paint and just primer. Its possible that it will never rust without getting it treated, but i dont trusted the manufacturer or anyone today with thier so called guarantee's. (Rant mode off

) Has anyone else found any difinate confirmation online of galvanized sheet metal being used specifically on the vibe? Anyone have any opinions of whether the spot welds and metal bending will affect the effectiveness of the "built-in" rust protection?