Looking for advice or similar stories about the following: I purchased a my 856 (second owner) two months ago, and it had the plastic protector still on the caseback (as shown in picture).
I never took it off, and wore the watch (mostly on NATO) nearly every day for the past two months. I took the plastic off today, and it appears that the steel has been stained. I have washed it and it neither pocked (can’t feel it with eyes closed) nor surface grime. Anyone else have this problem? Any suggestions on how to remedy?