Well all I can say is that none of my 3 Brooks saddle ever came with a mark like that on them. On top of the durability concern I would question the effect such a mark would have on your shorts/bibs since it appears to be in the area where you weight will be and with the normal moving about will it cause damage? I ignored a trunk bag rubbing on my bibs for one 20 mile ride only to get home and find a hole in them. Just another aspect to consider.