The invention relates to an apparatus (1) for surface treatment of an elongate object (50), such as a wire rope, while the apparatus (1) travels along the object (50), including a squeegee unit (10) for applying a deformable material, such as a coating material, comprising: a first and a second opening (16, 17) which are mutually aligned and through which said elongated object (50) is able to pass in a longitudinal direction (12), wherein a squeegee element (102) is provided between the first and the second opening (16, 17) defining an opening (15) which is adapted to the cross sectional shape of the elongated object (50) to distribute a coating layer by wiping along the surface of the elongated object (50) passing through said opening (15).