The Rust-eze product that sponsors Lightening McQueen in Cars (2006) is for a “medicated bumper ointment,” which is the equivalent of a medicated butt cream for humans. : r/MovieDetails
Vintage Walt Disney Pixar Medicated Rust-Eze Bumper Ointment #95 Red Racing Car | eBay
LEGO® Rust-eze Medicated Bumper Ointment Rear End Formula 1x6x5 Funny Sign Cars | eBay
Under the Hood: Meet the Sponsors | Racing Sports Network | Time to mingle with the sponsors! Meet the cars behind the your favorite racers. | By Racing Sports Network | Facebook
Rusteze Medicated Bumper Ointment Sticker – Wish Upon Magic