I've put two stocks through the dishwasher. One of 'em a correct grade. :yikes: Simple fact was that the correct stock was so saturated with grease that the endgrain wood and cartouches were peeling off when lightly wiped. Rather than wipe the wood with cleaners and wreck it, the dishwasher seemed downright benign. Turned out I was right. Sweated BBs until the dishwasher grinding stopped. Then joy! After refinishing with BLO/Minwax Tung Oil Finish I've got two really nice stocks.
Here's a definitive dishwasher thread over at CMP.
Be patient. It's buried in the archives.