ladies and gentlemen i have found that the best method for wasing you car is to simply take a high power degreaser and water it down to say 20 parts water to 1 part degreaser as the degreaser will damage the clear if used not diluted. make sure to rinse well with the hottest water you can get. best thing to do if you dont have a heated pressure washer would be to take it to you nearest car wash WITH BAY DOORS!!!!!!! that is the most important thing to remember. wind and hot water make ice really really fast (hot water freezes faster than cold water). you can buff in this weather however it requires more compound to first raise the temp of the substrate and maintain it to remove scratches from the clear. best thing to do is just rinse it every week with my "lite degreaser" until spring and then buff away. if you have any other detail questions i am a recon shop manager and have done recon for the last 10 yrs. so feel free to message me with any questions.