Double-faced tape works extremely well for mounting templates on workpieces — so well, in fact, that it’s very hard to separate them after the machining operation is complete. I used to pry them apart with a thin putty knife, but I’ve discovered a much easier and mar-free method. I saturate a disposable glue brush with acetone and brush it liberally along the edge of the taped joint. The acetone soaks in and immediately dissolves the tape adhesive, so the parts come apart easily. It also dries quickly and does not raise the grain.