METHOD AND AN APPARATUS FOR SURFACE TREATMENT OF AN ELONGATED STRUCTURE, E.G. A WIND TURBINE BLADE

There is described a method and an apparatus for treatment of a surface of an elongat- ed structure, e.g. a wind turbine blade, by simultaneous abrading and cleaning of the structure. The apparatus comprises an abrasive head which comprises an abrasive housing containing abrasive lamellae, which extend from an rotatable base of the abrading apparatus, and which abrasive lamellae are supported on a back side support brushes having almost the same length as the lamellae, and which abrasive housing is provided with a suction outlet for removal of abrasive dust. The apparatus furthermore comprises at least one brush head which comprises a brush housing containing a rotat- able brush base having brushes extending from the surface of the rotatable brush base. The brush housing is provided with a suction outlet for removal of abrasive dust. The at least one brush head is arranged in relation to the abrasive head for a simultaneous- ly movement of the abrasive head and the at least one brush head.