sloop 
So you don't recommend the sanding and/or grinding it off by a professional body guy?Originally Posted by Scott Larson
It's not really the driveline and/or frame and suspension components that you should be worrying about. Sure, they may look bad with some surface rust, but they are all of such a heavy gauge steel that rust-through is unlikely in all but the most extreme of cases. The body panels, seen and unseen, are the most prone to rust-through and should be protected accordingly. Thorough washing and treatment of all metal parts, whether frame and suspension or body panels is the only way to slow the ravages of winter. Not driving a vehicle at all in winter is the only sure-fired way of keeping rust at bay. WD-40 is an excellent rust preventative when applied after every wash during the salty season. Priming and painting ANY exposed metal should always be your first line of defense...
