Leaning back against the hood of your car is a potentially awesome picture for a car lover. But despite the photographic and artistic appeal, it’s not a picture many car owners would risk today, because we’ve learned a sometimes painful and costly lesson: those little metal rivets on our jeans love chipping and scratching away at a vehicle’s paint, and that road grit we didn’t even notice, will grind into a beloved car’s clear coat like a small piece of sandpaper. Yes, leaning on your car can be a bad idea, and leaning on someone else’s car—well that’s a whole other level of social faux pas—but even that is not as serious as a lien on a car.