My 3-day old SS watch still looks brand new 
However, I noticed something curious about the Milanese loop. The end piece that houses the magnet
I think it's clear that this piece is not made from stainless steel, but is probably coated mu-metal or something similar. I'm fine with that as long as it doesn't corrode, turn black, etc.
However, I noticed something curious about the Milanese loop. The end piece that houses the magnet
- shields the pretty strong magnet very well to the outside, it has no tendency of sticking to stuff, other than the band, not even to the palm rest of my MBP (which I was mostly worried about)
- scratches very easily (it's scratched all over from contact with the palm rest), and shows uneven levels of polish under certain light
I think it's clear that this piece is not made from stainless steel, but is probably coated mu-metal or something similar. I'm fine with that as long as it doesn't corrode, turn black, etc.