Abstract: In one embodiment, a sender unit is attached to the portion of the body corresponding to the damaged opposite portion and a surfacing unit is attached to the damaged portion. A sending head is traversed horizontally and vertically, either separately or simultaneously in a composite motion, over the undamaged portion of the body and this sender head is provided with a plurality of surface contacting probes which follow the contour accurately. Each probe moves upwardly and downwardly following the contour of the body and transmits these movements by flexible cable to the surfacing unit. The surfacing unit is provided with a surfacing head which also traverses the damaged area horizontally and vertically in synchronization with the movement of the sending head.