Auto body is a term used to describe the repair and maintenance of the exterior of a vehicle. Dents, which are indentations in the metal of a car, can be repaired by an auto body specialist. The CHASSIS is the frame of the car, and it is also something that an auto body specialist can repair. SEDAN is a type of car with four doors and a trunk. RUST is a form of corrosion that can occur on the exterior of a car, and it is something that an auto body specialist can remove. COUPE is a type of car with two doors and a smaller back seat. Tonneau is a type of cover for the back of a car, and it is something that an auto body specialist can install.