I'm a classic car guy, and I've used it extensively on cars. I've also used it on the motor
mounts on our boat.
This stuff is really pretty amazing. I do remember a post many years ago about a guy who was painting the bottom of his SUV with it. He took a break to take a leak, and got some on his equipment
. The subsequent thread was hilarious. In any case, it does NOT come off anything you get it on! Well, it will wear off...