Maybe its just an RC urban legend, but I've heard you can use a deep freezer - something that gets down 10-12F to freeze them off. The cold affects the glue, makes it brittle and you can break the bond. Never tried it myself, but I will when I have a chance since I have a deep freezer.

Otherwise I've used the 3/4" of acetone in a paint can soaked for 8-12hrs. Thats always worked, one side at a time, but it can be hard on wheel's finish. Also, its pretty much guaranteed to ruin the liner.