Air abrasion equipment

I am looking for a smaller, table top style air-abrasive unit that
can be used with walnut shell grit.  A colleague mentioned seeing
something like this at a trade show for guns a few years ago but
couldn't recall any company or product name.

Would anyone have a source for smaller air-abrasive units?  If you
do, could you comment (pro and con) on it's system requirements,
usefulness, care and safety features?

Molly O'Guinness Carlson
Head Tide Archaeological Conservation Laboratory
Wiscasset, Maine


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                  Conservation DistList Instance 19:43
                  Distributed: Monday, March 13, 2006
                       Message Id: cdl-19-43-017
                                  ***