What I’ve actually done before, if the ring has stones that take
heat, is heat the ring up with my torch GENTLY, and the wax will
melt off and evaporate. To prevent wax from sticking to the ring, try
spraying LIGHTLY some silicone spray lube. on it first, and then
make your shadow band or ring. When you separate the two, it should
come apart easier than if none was ever used.
Good luck! Steve