Alan, I found this video of a guy “Free Stone” sharpening one. From what I saw from watching this, if you can clamp this unique styled wide spine and wide beveled knife in your WE clamp, with the knife edge high enough up to allow complete, unencumbered, blade access and full bevel contact with the very wide and possibly convexed bevel, sharpening the Blue steel and White steel are not a problem with your WE stones. The wide contact area you need to make is the real issue.
I have not seen or sharpened one, personally, but this would be my plan of attack if I were to have the opportunity.
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