I personally prefer water based acrylics, much easier to clean brushes and the like and fix little mistakes.
My paint preference is Citadel which you can buy at Wizards of the Coast stores or probably at local hobby shops that sell miniatures (Warhammer, D&D etc)
Some figures require a spray down of a flat Testors Dull Coat and then paint and then Dull Coat again, some you can just leave the paint be...
People seem to like Apple Barrel paints as well which you can get at Wal Mart...again I would go with acrylics over most enamelshttp://www.colossalgames.com/supplies/citadel_paint.htm
And here is your answer DK http://www.starwars.com/community/askjc/jocasta/askjc20020528.html