I'd be more concerned about what road salt will do to your rust free California 122. Coincidentally, I garaged my Amazon-S for the winter yesterday, where she will stay until the late spring.

My Amazon came from a northern location in Saskatchewan where salt is not used, hence the body was spared the indignity of rusting out. I once owned a used 1965 122-S that was likewise driven in a more northern location. I drove it for 2 years before moving to Ottawa, where they use excessive amounts of salt to keep the roads devoid of snow. Well, after 1 winter, the floor boards of my 10 year old 122 rusted out! I had to fill the voids with marine plywood and roofing cement. It did survive another winter, but afterwards had to be junked.

The 122 and PV were not much better than any other car of the day for early rusting, especially when subjected to winter salt. The front fenders get packed with snow near the door and rust badly, as are the reinforcing member that joins the fenders to the front wheel wells. If you must drive your 122 this winter, I'd get it professionally oil sprayed (or undercoated) every fall, especially in these areas to repel the salt as well as possible. Let us know how the 122 fares next spring.
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Cam a.k.a. CVOLVO.COM