I've experimented with a lot of buffing compounds over the years to try and get a mirror shine on stainless... Usually with mixed results. I can get a nice lustre and clean surface, but most compounds always leave a fine series of "lines" - not scratches, but more of an ultra fine grain that is visible in bright light. Everything from Stainless Green, to Diamond White, All Purpose Blue, Rouge, and hand-cutting polishes leave this finish.
This week my goldsmith friend introduced me to a new series of buffing compounds designed specifically for platinum. The fine compound is orange and only available through jewellery supply (Gesswein in this case). And it works PERFECT. It gives a Rolex RSC level of lustre and shine with zero grain.
It's called "pumpkin"
http://www.stuller.com/products/prod...=59999&cid=535
Well worth seeking out!