Honstly, the best way to perfectly clean your bowl like new and get a nice big resin ball out of it is to use acetone. It cleans almost instantaneously, and evaporates quickly for easy resin collection. You can find it at any hardware store, probably in the paint thinner/solvents section. Just a little advice from a Chem major
That doesn't sound like a good idea to me. Why? Because if you are going to strip your pipe with it & then make the resin into a ball, some of the acetone might get trapped in & not be able to permeate to the surface. I've worked with acetone before & I just wouldn't trust it.
One can be rubbed on skin without any irritation...the other chemically burns flesh..
Yes, as everyone probably knows rubbing alcohol isn't harmful on the skin, but
acetone doesn't burn the skin either. If anything it will just somehow remove all the natural oil off of your skin.