Liquid pre treat they put down makes rock salt look like child's play in Chicago area. Anti-icing materials used are liquid sodium chloride (salt brine), liquid calcium chloride, liquid magnesium chloride, liquid calcium magnesium acetate & liquid potassium acetate. Keeps the roads better for cheaper in winter weather events but eats the $hyt out of our vehicles.

I will buff in spring and take chances with a car wash that offers underside blasts of water. The weather as long as it's above freezing I will wash in my driveway and pull truck into heated garage to dry. We just finished 15 straight days below freezing luckily it didn't snow and I didn't have to wash the truck. Looking like I may have to take up local wash $20 a month unlimited wash plan to get through Jan/feb though. Days above freezing have been far and few inbetween.

 

I have washed in the drive as low as 6deg, with a wash bucket and rinse bucket, can do about one door's worth before switching to drying. But I found a truck-sized touchless that I use during the winter instead. Desperately needs it right now, but this week's snow isn't done yet, no point until there's some sort of break.