Abstract: A machine and method for automatically buffing and otherwise treating vehicle bodies. A gantry type frame includes two side columns each carrying an extensible and retractable buffing head that can be driven up and down. An overhead bridge extends between the columns and can be driven up and down on them. Top buffing heads are mounted to move in and out on the bridge and can be extended and retracted toward and away from the top of a vehicle positioned between the columns. The buffing heads are controlled by an electrical and hydraulic system arranged to effect automatic buffing of the vehicle sides and top. The frame is moved along the length of the vehicle in increments selected to effect thorough buffing of the vehicle surfaces.