Just been into Wicked Wheels in Guildford, who used to send them off to Lepsons, and the guy I spoke to in there said they've stopped doing it, as they had so many problems with corrosion coming back so quickly, and failed lacquer leading to more corrosion. These problems tended to re-occur in months rather than years. They also offer no warranty, and the spokes are too thin to allow more than 2 refurbs and retain the structural integrity of the wheel.
It's not just kerbing that's the problem. The potholes around here make Guildford roads look like the surface of the moon.
At over a hundred a corner, I'm beggining to wonder if I should just get some new wheels without this issue, especially as refurbing with diamon finish seems to be an expensive temporary fix. And I wouldn't want these wheels with any other finish TBH.
Now I quite fancy gloss black cross-spokes with a silver rim.....