I suppose if you drove in the slush and it built up in the fender a lot, you could have trouble if you stopped and it refroze. I would walk around my truck on "slush" days after a drive and slap all the fenders and then giving each tire a quick brush off to knock the slush off. Sometimes, I'd go out and I'd have icesicles connecting my truck to the ground but it was never an issue nor was freezing under the fenders.
Hey, neat trick: I put a "MyHeat" 100 Watt heater in my truck on the center console at nights when the temperature would get near/below freezing. I'd run the cord right out the door and to an extension cord. I know... heaters and extension cords are a bad combo but we are talking about a heater that blew out heat like a slow exhale. Anyway, I haven't had to scrape a window in 5 years... Not talking about wiping off snow... just scraping ice off. That's 2 years in Albuquerque, NM and 3 years at Minot, ND. Yeah, it gets really cold there. Anyway, if that worked on a big F-350, guess whose Elio will get the same treatment if garage space isn't available. That's right. This guy.