There's a polishing thread on here started by me that came up with some interesting idea's.
Most people were against using nachines to polish!
I machine polished some M730 style cranks, then lacquered them, they've come up really good! Although they will only be suitable for use with SPD's as I would imagine they would scuff easily.
I polished a part of a GT yesterday and lacquered it yesterday so I'll see what thats like in a minute.