Sounds interesting Marty! Did I talk to you at the Wed. trade session at the Trop convention? Someone was telling about using a jewelers ultrasonic cleaner and said it worked great, even on hotstamps. What is yours like, sizewise and such and does it use a liquid bath (I'm clueless!)? If so, what is the liquid? Why your caution about hotstamps and rare chips, what are the hazards? Sure would like to hear more.