Tires & rims
I have found over the years that lacquer thinner works well to remove foam from rims, and I have never had any damage of any kind, even have taken rear foam from 1/12 th cars and made fronts with them.
Now having said that, I have only glued my foams on with contact cement, that is all you need. I know that some sedan racers use CA on the outer wall, easy fix to stiffen the sidewall, and LT will eventually loosen the CA, but if you have put them on with contact cement it will dissolve faster than the CA.
I have just yesterday loosened CA with LT on rubber, with foam inserts, takes sometime, but no damage. Did however, because I could trash the rubber, cut ti off at the rim for a few of them, sped up the process.
Hoped this helped