The place I bought the covers from http://www.ciadellainteriors.com/1955cam.html said he thought that using sticky backed velcro would be the way to go to stick the door boards on. He said to use 6 strips on the back. But did no mention what to do to fasten the material to the board. I assume some 3M spray on Cement might work and I should maybe use some padding under the cloth?

Still not sure what to do to fasten the seat back board to the seat back.