Wow so sorry for the problem and glad that you're getting a new replacement for this gorgeous boy. I am surprised as well that Chanel uses a "coating" to make their ruthenium hardware.
I now find this all quite funny because when the 16C rainbow hardware came out, there was so much worry over whether or not the beautiful rainbow hardware would "peel off" as most people thought it was a coating. So back in Nov/Dec 15, I did a lot of rainbow into how the rainbow hardware effect was achieved (also often referred to as "oil slick/rainbow" effect), and confirmed that the way to make the hardware like that is by heating and treating steel a certain specific way.
what is ironic is that now I know the "unknown" / non-traditional Chanel hardware metal of rainbow hardware which so many people were so worried about durability thinking it was a coating was actually treated steel, while what we considered "traditional" hardware like brushed gold, black hardware, and definitely ruthenium (maybe silver, gold and antique gold tooo possibly?) - are coated metal instead of treated metal.
I-can't-even
What I can't understand is
why they were done via coating? is it the only way to do it (e.g., this is the only way ruthenium metal is made/always accomplished via coating even non-Chanel)? or is it simply a cheaper way for Chanel to do it?