Hey Brian, I don't think I would of put a pattern over a painted blank. Next time apply some blue painters tape over the blank, then the pattern over that. Then once cut, the tape and pattern will peal right off. In the mean time, try using a heat gun or a hair drier on the pattern. Start heating at a corner. You may have to use a sharp knife to pry up the corner. One you have the corner up, the rest will come up while heating it. Good luck!