I am in the process in installing the two piece cardboard headliner. In the past, I remember reading something about an ammonia/water mix used to wet the cardboard, or just plain water..
I can't get the cardboard headliner to fit the curves and bend in other places all at the same time. Do I need to wet this stuff down? What works best for installing the two piece headliner in a 46 Chev 1/2 ton?