Better posting on the main forum as you are not likely to get many replies here.
Microwaves rely on water molecules as the energy transfer machanism, so wax is a no-no, in a microwave.
If done over water that would be better but wax is flammable and one can get static in m/waves. Not advised.
I would stick to carefully melting over water, in a pan, on an electric hob. The wax will float and when cool the bee parts should be a separate layer which can be cleaned away carefully, or you pop the lot in a toe of an old stocking or tights and weight it down, melt the wax which will float and leave to solidify.
Much better and safer to have a waterbath affair when melting wax, so no direct heat is applied to the wax containing vessel so the temp cannot get to the ignition point or any 'boilig over'. Wax is a fire hazard, and melted - particularly so.
Too late now, but cappings into a sieve or straining cloth, over a honey bucket and drained overnight is a good tip for recovering the honey before feeding a lot back to the bees!
Regards, RAB