Originally Posted by B-Line

Yeah, that's exactly what I was getting. Small black dots that seemed like metal was corroded off the case. I always thought it was my bracelet that was causing it, now I learned, it's sweat, oils from my hand... INTERESTING..

Mrkbbd, I do agree with you and could care less about keeping it pristine. But let me explain. The black dots and corrosion that I'm speaking of, once you start to get it on the hand rest, the flaked metal actually bothers my skin. The hand rest becomes rough, coarse, like sandpaper and becomes a skin irritant.

So the reason to protect it is less about appearance and more about comfort.