"Aching for a Medicated Bumper Ointment with a rear end formula? RUST-EZE, PLEASE!" —Slogan, Rust-eze Rust-eze Medicated Bumper Ointment is an American company owned by Dinoco. It sells medicated bumper ointment, with a rear end formula (which its logo reads), for cars with rusty bumpers, to eradicate rust. It was created years ago by Rusty and Dusty Rust-eze and since then became recognized trademark in the United States. In Cars 3, it was sold to Sterling and bought from him by Dinoco later th