Stan Wilder wrote:

Whatever you do, avoid fiberglass if at all possible; it just seems to
crawl out of every place and make you itch.

Why not look into some type of GM headliner material, it's foam backed
and will hide imperfections, life span is about ten to fifteen years as
evidenced by my 86 Olds Station Wagon.

There are also some very neat foam backed wall covering materials, I
think the down side to them is they come in about 30 to 36' widths, where
as the headliner material comes as wide as 72".