Abstract: The invention provides a device (10) for detailing contoured motor vehicle surfaces (11), including a cleaning head comprising a) a first chamber (12) having an opening (14) facing the direction of said motor vehicle surface and provided with a motor-driven application means and a treatment substance inlet leading into said chamber (12); b) at least one vacuum chamber at least partially bounded by barrier walls (28) having peripheries adapted to slidingly engage said motor vehicle surfaces (11) while maintaining a partial vacuum (26) there against to assist sliding adherence of said head to said surface, said vacuum chamber (26) being provided with a suction outlet (32) exiting therefrom; and c) a stationary portion (34) including guide means (36) and drive means for said motor driven application means.