Hey guys I decided to remove the interior sound and heat material and had really dreaded this job since it seemed really stuck to the car and hard to remove.
I had heard of using liquid nitrogen and other processes but thought I would use heat first.
Just using a small propane torch and heating a 12x12" area at a time I was able to remove all of the material inside in less than two hours. I was taking about 20 seconds to heat the area moving the torch slowly. Then using a gasket scraper the material would peel right up off the floor like it was nothing.
In my 87 4 door it amounted to a total of 10 lbs of weight.
The material in the trunk which weighs a lot more due to its thickness peeled right up without heat. It was 22 lbs.
Hopefully this video works.