Ding ding ding! Winner, I used dry ice before and it took about 2 hours to do the whole car. I wasn't able to get ahold of some for my new project car I am working on now. But, it was sitting in a non heated garage for a couple weeks in pretty cold temps, literally took 5 minutes to pull the tar out of the hatch area, I used my hand mostly, it pulled up in big sheets.