Don't be fooled into thinking it is just people in snow/wet/salty road areas.
I'm in SoCal and my car's hardly seen water on it in just over a year and I've got rust on both sides (photos in the thread linked). Going to take it in, just have to decide which dealer as I already wrote off the most local one to me after they f'd up my free maintenance and then didn't respond to complaints.
Oops, my photos are in the original rusty pillars thread:
http://www.ft86club.com/forums/showt...highlight=rust