Looks like the plating was slightly split and the zinc is starting to work under the plating. (See the same lines over the hair.) The area thought to be trails doesn't match the devices. (The lowest one.)
Edited by coop
09/19/2010 9:40 pm
09/19/2010 9:40 pm












pmd to me, in the pictures you can actually see the difference from the normal circulation scratches.







