Well... I just used acetone to get a MT tire off the rim and I ended up cutting the majority of the glue with an exacto. I was in a hurry and was only applying acetone to the bead by hand using an eye dropper. I tried debonder, but it didn't work much better in a short time than the acetone.
In the past, when time wasn't an issue, I made a little container that was large enough for an MT tire to lay on it's side. I then put enough acetone in the container to go up and fully cover the bead. I'd leave it in the acetone over night, flip it over, push the bead of the tire off the bead of the rim and let the other side soak until I got home from work. Letting the acetone soak pretty much dissolved all traces of the glue and the tire would pop easily off the rim.
The only bad side effects are the fumes and it ruins the foams. As the glue dissolves into the acetone, the foams soak it up. When the foams dry, they are hard as a rock due to the glue being in them.
Regardless, that is the only way I have been 100% successful at pulling tires off of wheels without damaging the tires. I did it to 16 MT tires and 10 2.2 stadium tires last winter. Took about 15 days. I could fit 2 or 3 2.2 tires in the container and only one MT tire.