Glad to see that's still coming in useful, any questions on my DIY version (or g'diy as we say here in Australia!) feel free to ask.I think this might help Jonathan. Read down to the tutorial.
Some of the 'high-end' watch service centres have lapping machines for refinishing cases, but they charge high end prices. I've not heard tell of any independents like Rocco who are doing the same in the states.