What Island Schwinn said. There is a common practice these days of using a process called "acid copper" that is VERY beneficial to restoration parts. For heavy pitting on metal and pot metal especially, acid copper does a great job of filling pits without having to do the laborious and risky process of grinding and grinding on a part and potentially ruining it.
That said, acid copper fills everything. It fills knurling, I have an incredible looking set of re-chromed S2's, only problem is the knurling is completely invisible now. It will quickly fill in the stamped lettering on hubs, etc.
I'm working with a local plater now that knows to go light on the grinding around stamped-in letters on parts. And then they use nickel and chrome without the acid copper.
I'm no plating expert, I just got the lowdown on it all from my plater a few days ago. Maybe later I can post photos of a New Departure hub that's had acid-copper application and one without.
$40/ rim is a good price.