+1 Acetone in a coffee can, with a lid, as stated above. The acetone will dissolve all the CA. I leave 4 wheels submerged over night. Check after the first couple hours to see where they are starting to release, lift the edge to allow the acetone to penetrate deeper. Most are completely loose by morning. CA pinches created while gluing, are gone after the soaking. Done a dozen this way. I've done this with 1:5 scale wheels as well. You use a half bottle of CA per wheel with 1:5 wheels, I think getting them hot enough to crack free all that CA would destroy the rim. Do use caution with the foam inserts. They will tear very easily when soaked with acetone. If you can remove the rubber with the foam in it, let the foam dry out, before you pull it out of the tire. You'll be surprised how much sand and silt your storing in those old buggy wheels. After a dozen wheels the can's bottom is covered with sand.