I saw another post where you reccommend using an Ulltrasonic for cleaning brushes and other tools.

Have you ever had any problems related to the ultrasonic, say like damage to the tools?

I know the ultrasound can do weird things to metals if you forget and leave 'em in too long.. I once forgot about some polished aluminum pieces I had fabricated and left them in my dad's jewelry U/S. When I remembered they were still in there they had veins showing up everywhere in the metal, kinda looked like marble.

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Mike Pipes
Digital Illusion Custom Graphics
Lake Havasu City, AZ
http://www.stickerpimp.com