I am not sure about the road salt but I do beleive it isn't good to continuously remount tires. IF the snows are on other wheels it will save the cost of remounting tires and then you can just bolt them on

- 95 Mystique LS - Zetec/5spd - 99 Contour SeVT Sport - Duratec/5spd Official NE-CEG Contour/Mustang Family