Salting is useless if it gets too cold. So it’s only done at max -7C or so (if memory serves right). Here in Finland the southern parts are a salth bath. But th

Salting is useless if it gets too cold. So it’s only done at max -7C or so (if memory serves right). Here in Finland the southern parts are a salth bath. But the colder northern parts are not salted, and that shows in the average rust levels of cars.