I have had a few kydex holsters and they have been for black pistols. I never noticed any marks on them from the kydex other than holster wear from normal use. But now I have a stainless pistol in a kydex hybrid holster and the areas that have the satin finish on them get loaded with black marks all over them. The smooth stainless areas don't build up any black marks on them. While the black comes off, it's sort of annoying. Is this always the case with kydex and satin finishes? I know the satin finish causes more friction on it so I assume it's actually rubbing a bit of the kydex off every time it slides across it. I also assume that eventually it will leave shiny marks on the satin finish from the friction. This is thick kydex also...like .9 stuff so maybe it doesn't have enough give and that's the issue.