Walnut shell blasting of Actions: That is correct: I first saw this in a shop that "reprocesed" (well then they were circut boards) from electric organs (computer parts). This man in the middwest would place circit boards in a box, to clean them...very nicely by the way. He went through a lot of walnut shells if I remeber, and I'n not wuite sure if this, but he actually collected them himself, from trees in his area. Been a long time. Gregory
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