I have a black 2" strop from Five Star Shaving which was a vast improvement over my original Ebay strop. Problem is, I've been finding random green stains on my white countertop. I couldn't figure out what they were until I touched up the edges of the strop with the pummice stone and it left green stains everywhere when I got some water on the countertop.

Do all strops leech color when they get wet? Or just all black ones? Or is it just that the five star strop is cheap?