Nice!! I have never tried to make a patina - they just seem to come naturally!
Onions seem to have an almost immediate impact on the 01 steel, even though I am religious about rinsing and wiping my kitchen tools immediately after use.
I like the blue almost "opalescent" patina that you got there - I have seen this on a couple of my knives - but less regular. It almost looks like anodizing! Maybe that is a new technique, mustard anodizing! :thumbup:
BTW - is that a KYe custom lanyard?
I am so happy to see the Stubs getting used - keep those pictures coming buddy!
best
mqqn