Unfortunately I've been finding that since manufactuers have switched to using CA glue as an adhesive they don't design the plastic for the rim to be able to stand up to contact cement. I know the CRC rim melts in laquor thinner and unfortunately it is my favorite rim for 1/12th. So I've had to resort to using contact cement without laquor thinner to glue up the foams. Then to remove the old foam I use my tire truer and true it right down to the rim.