Blackjack,
I went with a granite look. It consists of 3 coats of epoxy, one coat of polyurethane, with vinyl chips added to give a granite-terrazo appearance with a slip resistant surface.
Here's a paicture of how it looks.
Its been down for a couple of months now, so I can't really comment on how durable it is. I do have a 4 post lift that's moveable and it rolls fine on the surface without any sign of scratches, etc. Also have spilled several types of fluid with out any problem and dropped tools, etc.
