So I'm aware that this is a silly and maybe idiotic concern, but still I'm curious--why is the brand new Brooks saddle I just got in the mail tarnished, and what can I use to polish the random blackened rivets without damaging the leather? I've never seen this problem on any other Brooks saddle, old or new. Scratching with my nail removes barely any of the blackness, and rubbing with a dry cloth is useless. Google hasn't helped me either.

The saddle is going onto a vintage Peugeot road bike that's a decade older than I am, so in a way this faux-aged aesthetic could work, but seeing as how I spent more on the saddle than on the bike, I'd like to see it shine!

Any help would be appreciated.