My headliner is in good shape, but it sags a lot in the middle. I used a steamer to heat and moisten the pressed fiber material in the area of the sag, then set the piece over some gallon paint cans set in line to hold the shape. when the steamed board was dry, I sanded it all with 40 grit, and applied generous coat of fiberglass resin. Once it sets up, my headliner should be good as new.

James

 

hope it works please let us know. thanks,Ray

 

It appears to have worked very well. fiber board is stiff and curved properly again.

James