Howdy. If you have chrome accesories, you can clear coat them (which won't stop the corrosion, only slow the process). If you have painted stuff, your best bet is to powder coat, though admittedly this can get expensive. I think there might be some powder coating that looks like chrome too.
There is a product called Waxol (sp?) that the british car crowd uses, though I think this is mostly for under car, in doors, in frame rails, etc. Something worth checking into anyway.
A cheap alternative would be vaseline, which does an ok job when cold, but will run right off with any heat.
When I lived on the east, I just tried to wash my vehicles all the time, particularly in winter to keep at least some of the salt off and the corrosion to a minimum. When I was into MGs though, I did complete rust removal, only to find rust appearing 3 years later despite my best efforts. ARRGHHH!