Thanks I just googled a bunch of images and saw similar marks. They are feint but annoying nonetheless. I guess ill try the alcohol.
I am pretty sure the cpu was not used before, it came in the retail box with factory tape etc.
The best description I can give is a very light pencil mark... Again not a scratch... looks like either the stamp for the ink marking or someone put a plastic sticker on it and peeled it off approximately 3/16" in from the edge of the chip.