I like the acetone method but sitting them on something above the liquid. doing this saves the expensive closed cell foams but the downside is it takes a few days to release the glue. the vapors will work just takes longer. but you also save a lot of acetone.

if you want to test your rims and see if you can use this method put a little acetone on a rag and wipe it on the inside of your rim. if the spot feels soft or sticky after a few seconds it will probably melt the rim.