[codefox1]

I like to perform these not so delicate operations outside. Turn upside down and tease with the propane torch all around until the crap drops out onto the newspaper or whatever you have thoughtfully placed beneath it. (This also works for potted transformers.) Twist the remains until it all severs and comes out. You can soak the can in paint thinner (outside, please) overnight to dissolve the rest of the drek.

Then there is the put in the freezer method, and the corkscrew method, etc... Lots of other methods, most not all that nice. Protect eyes hands, etc...