Can winter washing cause more damage?

[SYMAWD]

I rust proof the heck out of mine (sprayed inside doors and behind panels). Once it's rust proofed I think its best to rinse as much salt off as is possible.

The only negative thing I had happen to me was; my drivers door weather seal froze to the door and tore apart when I opened my door. Now I just dry the door jambs better.

Not quite the same, but at the BMW dealer I work at we wash every car regardless of temperature. Parking them immediately after the wash= a lot of frozen parking brakes.