[meteorite-list] Polishing Chondrite Slices

[David & Kitt Deyarmin]

I just bought a Ghubaro and plan to have part of it made into a sphere, 
obviously ;), and the rest will be cut into slices

I would like to polish the slices and was wondering if anyone has any 
experience doing this.

I have a variety of belt sanders and palm sanders but I don't know what kind 
of abrasive to use, is there a specific type for polishing "stone like" 
material?

Of do I have to buy a machine like this one:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=020&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=300107079366&rd=1&rd=1

Any help would be appreciated.