I have never turned any of these particular blanks. However, I have had a "steampunk" blank, the foil type cast in poly resin, shatter on me a while back. What I did was place the broken blank into a small jar of acetone and let it dissolve the poly resin. Then I cleaned it up repainted and re cast in PR. I do not know what effect , in any, acetone would have on the mother of pearl.