I'm gonna have to side with Ronstang for the most part and it's not "just" paw prints, sometimes a cat will extend it'd claws when jumping on a car, damaging the paint. The slick surface can instinctively have them extend the claws looking for traction, I'm not anti cat at all but if you own one (or a dog) keep it inside please, having feral cats roam around fucking and fighting all night is a nuisance to your neighbors..