This is one of the issues with rhodium plating or nib plating. Any nib work done will disrupt any plating that is there. When you get nib work done, not only is the bottom ground, the top is also ground. In my shop, when I do grinds like this, I clean the surface well and replate the disturbed spot to restore the look of the pen. The problem comes with gold-plated steel nibs. There are so many colors of gold plating, and simply replating it will put a spot on the nib of a different color that would be noticeable since the eyes are so sensitive. What I do is carefully grind so as not to disturb the plating on the main body of the nib so that only the top of the tipping ball is silver and is polished to a mirror-like finish. This makes for a nib that looks more "professionally done." This works because the steel and the tipping are both of a similar color, so we don't see what we see with the gold nib.
Finish work on nibs is extremely important. One can't have scratches on odd parts. Everything has to be polished and look clean and perfect. In my early nib repair days, I wasn't as nit picky about these things (If I did a nib for you in the past and it wasn't well finished, I'll take care of it for you. Send it back to me), but for quite some time now, I consider it a high priority to make everything look polished. One should be proud enough of their work to take a picture of it with a good macro lense and post the picture on the wall in a large size. To my knowledge, Richard Binder of all people is very careful with how his nibs are finished. Greg Minuskin is another person who is also careful with this. These are things that are very important and need to be looked at. That said, I'm really wondering what is the best route for you to go with replating. I do rhodium, but I don't have as much experience redoing the other finishes that Nakaya uses on their nibs. I certainly don't know what shade Nakaya is using for their rose gold nibs. We don't want a shade mismatch.
Personally, if I had a ruthenium nib that was done that way, I would probably replate the entire nib to make it match. I don't have a source for ruthenium plating solutions and other things though. While I wish I could possibly help you all with that, I'm not sure I can. If you are like me, I can certainly see why you would be bothered with such a thing. I think it's a big deal.
Edited by Dillo, 21 January 2013 - 05:43.