When I was shopping, I looked at a black chrome M5 beater. Literally-the top front corner near the shutter speed dial was badly crumpled. Otherwise, the finish didn't look too bad. I opted to buy an umblemished black chrome M5 body. It doesn't appear to have ever been used. Next to my black paint over brass Canon EF, the M5 doesn't show any brassing. The Canon has one short edge where the strap has worn through the paint. The brass underneath looks fine. The black paint has a shine that the black chrome doesn't have. They look different but they look fine to me.
Hope this helps.