I had a pink sand sports band. Wore it daily. Overall, I think it repelled a lot of everyday stains.
But in my job, I have about an hour a day I That I open boxes at a retail store. Weirdly, the ink from the cardboard boxes stained my watch, and I could never get it out. Mind you, this same ink has never stained my clothes or my skin. But it rubbed off and remained on my watch bands.