I am happy to use my Austins throughout the year but do not venture out when there is salt on the road. I did a couple of VSCC Measham rallies when there was salt on the road and no matter how you hose the car down afterwards, the salt gets into those awkward crevises around the wings and running boards.
The saloon is very cosy in winter, the whole bulkhead gets pleasantly warm and the moquette seats help.
Unfortunately the road leading to Boltby is probably the most heavily salted road in Britain. Just east of Boltby is Sneck Yat, a fearful 1 in 4 hill. The gritter comes out early morning from Thirsk, through Boltby and turns round at the foot of Sneck Yat to return to Thirsk. The exercise is repeated early evening, so I get four doses of salt on the road each day in winter.
Sometimes the layer of grit and salt is more of a skid hazard than the ice or snow!