We (Cheryl, Corey, Keita) have been cleaning HAM6 in-chamber optics for a while and finally we've pulled first contact today. Most of them were beautiful but one of 2" high reflectors, E1100048 SN 1042, was rejected because it had two major defects at about maybe half diameter.  The first picture shows the entire mirror surface in which the ring structure is apparent. The second is just a zoomed-in view that shows both the ring and scratch/dig next to it.

Right after pulling the first contact the ring and scratch/dig were both visible without any special lighting. Since I wasn't able to move them by a gentle pushing using a wipe, and since they were close to center, a second coat of first contact was applied, but nothing changed. After pulling the second coat, methanol wipe was attempted, which removed  some residual first contact and made the scratch/dig thing less visible. The picture was taken after wiping.

Prior to this inspection, nothing touched the mirror surface in the cleaning process except for barrel wiping and first contact application, and it's not clear if the defects existed prior to cleaning.