On the sides of a heavily used car, some years not even CanCoat/Moonlight is gonna stand up unscathed to the 5000 miles of no wash, no maintenance Winter freeway driving I'll do in 3 months; it's not just the chemicals that get kicked up from the road but also all the grime and garbage that physically abrades (in a sense) the lower side panels of the car. My car won't get any maintenance from November thru April so that stuff just builds up. Hood, roof and trunk lid will be fine but it also seems like the vertical part of the trunk lid gets killed too along with the back bumper. I could probably help it last with an occasional wash but it's too friggin' cold for my old bones generally.
They use everything in Ohio at the first hint of snow; I think it's a chemical brew though up by a car-hating tree-hugger :lol:
Ohio De-Icing:
https://www.dot.state.oh.us/Divisio...tive(s)_-_Snow_and_Ice_Control_Treatments.pdf
And then even when Spring hits until we get a couple of monsoon-like rains to cleanse the World, the residue stays on the road for months and 're-energizes itself' every time it rains a bit. I'm still washing salt dust off my car in April some years after driving on a dry day.
I take the Winter off w/ regards to car care; my wife's daily driver hasn't been bucket washed since late October most likely and hasn't seen the inside of a soap/rinse only tunnel wash at all. My daily last got bucket washed around the same late October time and has seen the touchless tunnel wash twice since then. It's actually kinda nice to ignore care-care for 5 or 6 months :lol: