Rich -
I've been to Bonneville 8 times since 1994. I've cleaned salt from underneath the Midget, Kate's Ford Escort, a rental Ford Taurus, my '97 Ford Thunderbird (a car I wish I still had), Kate's Subaru, and my Magnum.
In all of those trips, I never saw more destruction than what the brine did to the Magnum this year.
It was like the thick white candy coating you see on pretzels at Christmas.
I'm trying to get it cleaned up - 3 days with the sprinkler so far, and some of it is simply not coming off.
From here on out, I'm taking Steve's approach.
I suspect I might have one winter left in it. If I keep the Magnum, it will be only be to pull the Hemi and transmission for a future project, and then to part it out.