I looked out in the shop and all I had was a can of Acetone. It worked pretty good but was a slow and tedious labor! Took about 30m min to get the headliner insert out and another 5 hours to get 90% cleaning completion. After using a steel brush to get the heavy foam out I used Acetone on about a 6"x6" area with a putty knife to scrape glue and foam off. Still have to finish edges and some portions in the middle and right panel. Anyone think it would be a good idea to spray primer it before gluing the fabric on? My back is aching so tomorrow is another day!