The Rust Repair Kit is a consumable tool used to remove the rust from vehicles, and some of their parts. It is often used in conjunction with the Dent Repair Kit to achieve a smooth, even finish across the whole car.
To use one, equip it using E, and click the body panel, or part that's wished to be de-rusted; the whole kit will be consumed during the process, and the part or body panel will be left rust-free. For especially rusty panels, it may be needed to reapply a layer of Clear Coat to make the color match the rest of the car again.
It can be purchased from Kali-Gas for $49.99 each, with a total of four stocked on the shelves per day; after unlocking it, Roger Pièces D'Autos will stock additional three, purchaseable for the same price as at Kali-Gas.
The Konig will be the primary vehicle these kits are used on, but they can also be used on the OlTruck's chrome grille and trim, the Buggy's frame, and any rusty rims on other vehicles, like those on Le Missile.