I have the Home Depot $1.99 window film as grill block and rear wheel fairings. The grill block I've had for over a year and the fairings 6 months. It seems to last about 6 months before you have tear it off an replace. (Replaced grill twice). I'll do a tear off / wash/wax and reinstall in the next month or two. Last time I switch to two sided carpet tape instead of the thin stuff they give you in the box.
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