Thanks everyone! Lots of great advice. I actually have nitric acid, as I used it before to etch silver. Was quite surprised that I could just buy it at a drugstore. For now, I have looked at the forum for some other ways to get beads off a mandrel, and I will give the rivet tool suggested somewhere a go on my next set of beads. I tried it on some plain beads that had gotten stuck for some reason, and it worked on half of those. The other half cracked, probably were already broken or had cracked bead release.
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