Stripped sound deadening marterial

Waited for the temperature to get low and then I used a ball peen hammer to bang on the floor to pop the material off. In less than an hour I was done -- without any scraping, chemicals or flames. I didn't hit things too hard so I didn't leave any dents -- just a couple of little dings that I could easily pop back if I wanted.

I found about five areas of rust in the floor. Total about 1 square foot area. See all 9 pictures at EP-Build