Prep Start Dental Abrasive, Any Good?

[Asteroceras]

Anybody used a Prep start Air abrasion unit for cleaning fossils, was looking to purchase one for my home workshop and was wondering if any of these dental units are useful for prepping fossils? Mainly the Prep start though as this is one i have an option to buy. If any one has a video of one in action that would be brilliant, or images of work they have done with one, that would be most useful.

Cheers

Dan

Edited January 19, 2013 by Asteroceras

[jpc]

sorry, I don't know this system.

[Asteroceras]

Usually use a swam blast at a friends workshop for my finishing, but wanted a small unit for my home setup, these little dental units are the only ones I can find for sale at a reasonable price.