I'm redoing my cabin, and the 35 yo headliner is giving me problems. It needs to go (mold), but when I pull it off a lot of the foam backing stays on the cabin top. I've been using a wire hand brush and wire wheel, but they seem to be damaging the fiberglass. I've used a plastic scuff pad, but it takes forever.
I've heard I can use hydrogen peroxide mixed with water, has anyone else had success with that? Any other tricks? My plan is to paint rather than tack up more material.
The fein tool works on this sort of thing. Using the oscillating blade, I used one to remove foam sound deadening material from panels around the engine compartment. Does not harm the surface. Gets under the adhesive holding the foam in place. Much cleaner than sprays etc.
I'm not sure what type of glue it is. On the area of the headliner that was wet, the glue peeled away easily. No I don't know if years of moisture did the trick, but I'll try that next (with h2o2 or wallpaper remover) given the lower risk than thinner. Fortunately, only about 20-30% of the foam stays on the ceiling.