Without harming them, as I know they are just cats being cats. They are scratching my car with several light claw marks in all different places where they are climbing on it. of course I tried to google it and there seems to be several things people do that say they work and then others say they don’t. Anyone have any actual experience with something that worked for you? Someone said just put cayenne pepper around the car, but I haven’t tried that yet as it just seems silly.