Anticorrosion Materials
WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
In order to provide rust resistance, anticorrosion materials have been applied to the interior surfaces of most of the metal panels. When servicing these panels, properly re-coat them with a service-type anticorrosion material if any of the original material has been disturbed.