When I had my body painted, the restoration shop made braces out of one inch pipe with welded flat bars on the ends that he bolted to the top hinge position on the A pillar and the door latch position on the B post. This made a rigid frame out of the finished welded body. It was then mounted on a rotisserie and sealed and painted inside and out body color.
J. Brady
678462
54 XK 120 DHC
Bedford, MA