Here is the knife without the tip
Here is the final result. I decided to take just a little from the edge and reset a fresh bevel without thinning at all. I would say about 80% was removed from the spine portion.
Started with a coarse diamond plate working up to asagi finishing stone. Should just fall right through whatever's being cut. Passes paper towel test
The knife appears to have genuine damascus cladding that is surrounding the core. FWIW it should be possible to thin these shun and retain the pattern for aesthetics.
Feel free to move this topic to the sharpening section if its more appropriate.