We used the alcohol on the painted walls and brick to remove the hot glue, it worked great. It did remove a little paint which was fine because we are repainting. I work at a school and we had to remove alot of it. We were chipping away, we tried heating it and that made it worse. There were 5-6 of us working on it while racking are brains on an easier way. I googled it, found your tip. After that it just took 2 girls to finish up and got it done in the time it took 5 of us that worked on it all day. Wanted to say thanks!! Now we can go home and ice are sore arms from all the chipping we were doing before I found your tip