Ok so I have been reading loads of things regarding retrimming headliners, the majority of which say to remove the headliner material, but is there anyway I can just use some spray on adhesive and attach the new fabric over the old one? I don't really want to go to all the bother of removing the original headliner fabric, which is in perfectly good nick, I just want to personalise it a little and freshen it up I'm going to be using thin dressmaking fabric if this is possible?