I received a call from a guy that has 60 linear feet of Kemresin in a lab and he wants the "etch marks" and scratches to go away.  I read about this product on the "innerweb " and it is supposed to be impervious to staining and only need linseed oil treatments every now and then.  The attached photo says otherwise.  I generally try to stay on the natural stone reservation, but this project might pay for some extra Christmas presents!