That makes two of us.
I really think it's from my chamois but i don't see nay wear on my shorts/bibs. I'm kinda dumbfounded. I've only treated the saddle to Proofhide and the discoloration appeared out of nowhere.
I really dont want to exchange the saddle since it is a limited edition, and I'm not sure if there's any more "out there".
A limited edition yikes for replacing but yippee for such a saddle.
Try this, take some tape and tape off the leather around the rivets so that no exposed leather is showing just the copper rivets are showing, and tape off about the first half of the saddle completely except for the rivets of course.
Then go buy a small container of Wrights Copper Cream for about $6, and a very small round toothbrush, or a use an old one if you have a small one.
Then get the brush wet and put a spot of the cream on the brush and gently rub the rivets. This is why you need to cover up the leather because I'm not sure what this cream will do to leather. After that the copper should be shiny and bright copper color. Then get a clean damp wash cloth and wipe the rivets off and do it again with a clean wet section of the wash cloth, this is why you need to cover the rear half of the saddle so you don't get it wet. Then use a soft cloth and wipe the rivets dry.
Wrights by the way is a very mild abrasive cleaner, it will not damage the copper though like some cleaners can, and because it's a very mild abrasive it shouldn't damage the leather, but to be safe cover it. I could not find any internet reports that using this cream could damage leather, SO I e-mailed the company with the question, if you want to wait for the response from them before trying it then great, as soon as they say yah or nah I will let you know, if you don't want to wait and just want to do it or don't want to do that at all that's ok too.
If the oxidation returns later then repeat the above and consider as an option this: buy a very thin model paint brush and some lacquer and "paint" the rivets with the lacquer, do 4 coats, drying between each coat. Again tape the leather off around the rivets so as to keep the lacquer off the leather.