Have a 2 year old Tudor BB Bronze; it might be that their bronze alloy is a tad harder than some (I recall it was some specific formulation) but no mechanical damage at all and it tends to be my go-to for when I might be humping stuff about or off road cycling etc. It has lost its initial (over) brightness and settled down to quite a warm tarnish with no green. An AD spotted it in Windsor a few weeks ago and stated that each one is different and it seems to depend on the body chemistry of the wearer as to how it ages.
I like it; so much I now want a new Panerai Bronzo… can but dream