Mature Metal discussion

I’ve owned two pieces before. The most recent is the Alcatraz, which you can find [[here]]( While it claims to be stainless steel, it turns out to actually be chrome plated steel [[chrome plated steel]] My keyholder is a bit cautious about buying another metal piece, but I’d like to convince her that a Mature Metal option won’t rust (if at all possible!!). Has anyone else noticed any corrosion on their Mature Metal pieces?