I live in Ottawa, Ontario, Canada. Winter is from Dec to Apr. Tons of snow and road salt. Cars here rust out like crazy.
My 2004 Swift+, 250,000km has no rust. I'm very surprised.
I've had a bunch of 1990-1996 Swifts and the are terrible for rust. So I've been watching the Aevos on the road, haven't seen rust yet, which is awesome. I'm thinking maybe the body panels are galvanized or something.