I just did this with a GEC and it turned out nice, but I got some black spotting on the blade and backsprings. Not a big deal, this knife was a user anyways, and I can always sand and polish it off. But I'm thinking about doing this with the new GEC 77 elderberry to get it from the pink to what their elderberry bone usually looks like. It's a new knife, and I'd want to prevent or at least minimize the spotting that happened with this one. Did this happen to your knives when you did it? Any tips on minimizing it?