Re: Headliner issues
once the board has become uneven, it's difficult to get it looking smooth again. the fiberboard headliners like that have to be cleaned very carefully to avoid this. depending on how big diameter these areas are, you can "float" the material over them. meaning not glue the two together. this generally works best on small areas. the other option is to buy double material and wrap it twice. this usually makes those spots a lot less noticeable. and trust me, if you don't think they are too bad looking, it will be magnified greatly by the new material.
Krylon Fusion is for Amateurs.