If I were a vase with silver design, it would be me. I am a human, but have silver design on my head. There is a difference. This vase will again shine after a wash in soapy liquid. I wash my hair regularly, twice a week to be exact. Perhaps I am using the wrong shampoo, but my hair still has a grey patina.
The problem with human patina is that it is permanent and not only on the surface. It covers everything, from the bones to the skin and, of course, the hair where it is most noticeable. My vase has survived, it was an heirloom from my mother-in-law, and probably older than I am. But just a wash and brush up does wonders for it.