Anti-Corrosion Protection
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Anti-corrosion materials have been applied to the surfaces of the metal panels in order to provide rust resistance. When servicing these panels, properly re-coat the areas on this material that have been disturbed using a service-type anti-corrosion material.