Rust-eze sponsors Lightning McQueen at the start of his career in Pixar’s Cars.
Rust-eze is a fictional medicated-rust treatment brand whose orange sponsorship decals appear on Lightning’s red body. Lightning initially dislikes the association because he wants the prestigious Dinoco sponsorship, but the Rust-eze team supports him during the Piston Cup season and becomes part of his identity.
The sponsor is important to the film’s character arc. Lightning begins as an arrogant rookie who treats Rust-eze as an embarrassment. After becoming stranded in Radiator Springs, he learns to value the people who helped him rather than chasing status alone. By the conclusion, his relationship with Rust-eze has changed significantly.
Dinoco is a separate fictional brand associated with The King and later with racing prestige. It is therefore a common answer mix-up. Cars 3 also revisits Lightning’s sponsorship as he adjusts to new competition and changes in the racing business.