I gave these a quick rub but they do still need cleaning.  I found no damage on the porcelains but the lids have surface scuffing.  They are somewhat grouped in the photos.  The upper 6 in the 1st photo have the same mark.  The other pairs of 2 have the same marks but are different than the others.  You will see 3 more in the last few photos and they are included as well for a total of 15.