Headliner replacement is fairly easy on Deloreans, it could be done by a novice in about 2 hours or so. do not try to re-glue the headliner, just replace the material. you can probably find the headliner material at a fabric store or at a Pep boys auto parts store. the headliner on the door is held on by plastic push in fasteners like those found on door panels, just be sure to use a panel puller tool. once your headliner is off remove all the old fabric. now you will have to remove all the old glue and excess materiel off of the headliner shell, I use a DA sander for this but I have found out that a plastic bristle scrub brush works well. make sure surface of your headliner shell is clean before you lay the new headliner down. now this is the tricky part, since the shell is deep in the middle you will have to start from the center and work your way out with the material, it might take a few tries to get it right. Tip: take some spray adhesive and spray very lightly on the shell, let set a few seconds and lay the new material down, just to get the hang of it. by spraying lightly the material should come off easy. Now you have had some practice at it, to get the fabric to stick permanently spray the shell and headliner fabric with some good spray adhesive like 3-M trim adhesive, wait a few seconds until the adhesive gets tacky and lay the fabric from the center out. Tip: make sure your hands are clean when laying the new fabric down. Material cost Headliner kit: Pep boys $29.00 or Headliner fabric: fabric store $5.00 to $8.00 per yard 3M spray trim adhesive: auto parts store $8.00 per can hope this helps you out, Mike G