Attached is a photo of the piece at the back upper corner from a '29 Tudor where the headliner tacks into. What is the material supposed to be inside the track where the tacks go in? Its not wood - cork? Its dead whatever it is and needs to be replaced.
When I restored a '29 Tudor, I cut strips of thin aircraft plywood on a 45 degree bias and slid them into the holders. I appeared that the originals were some sort of fiber board. Gar Williams