Hi mate,
I’m afraid your mistaken.
There is zero damage to either disc, they have never been used. One of them was mocked up on my car when I test fitted an f80 caliper (video on my Instagram - Z4coupeuk) - and here I simply bolted the disc to the hub, took a video and took it off.
More than happy to send you a video in detail of both discs.
See photos I’ve just taken - what you’re seeing is the silver metal under the rust proof coating