They are particularly mild shavers due to a very fat bevel angle. (Except mine... I slim them way down.)
So you tape the edge and hone the spine down on the 220?
I noticed the one I got from Seraphim had a lot of spine wear as well. I figured it was intentional to adjust the bevel angle.
Just got my 22.00 Gold Dollar from Buca today! Waiting for a couple of days growth before I shave with it (1st Straight shave)
Good luck! Remember to stretch the skin tight, and keep the spine close to the face! Come back and tell us about it! Happy Shaves!
A buddy of mine bought a "shave ready" GD on ebay and it was terrible (neither of us hone) if I were to start again I would order the GD from Buca instead of my Dovo best