Tuesday I washed, clayed and waxed my Z so naturally Wednesday it rained and I had to run some errands. Didn't get around to washing the car today and wanted to spruce it up for a short road trip tomorrow. The top and hood are clean but the sides and back end are covered with a really fine, gritty coat of road film from the wet roads. Light rub with a finger doesn't move the stuff so it's stuck on pretty good. The paint on this car is really pristine with no dings or swirl marks anywhere other that a few really tiny rock chips up front. I tried some UQD and a microfiber towel on a small part of the front fender and it cleaned OK but I'm really nervous about causing some tiny scratches with just the UQD and a towel. I use a California duster to get rid of dust on the car but this stuff is worse than dust. How safe is it to clean gritty stuff with UQD? I know a soap and water wash would be preferable but if circumstances prevent it would UQD work?

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