Here's a 240Kono White #2 with a twice forced mustard patina. I used dijon thickened with mustard powder. I cut out two strips of small bubble wrap to fit both sides of the blade. I then spread an even & thin layer of mustard mix on the blade. Next, I laid the wrap cutouts gently in place with no lateral movements. Once in place, I evenly distributed downward force on the wrap to disperse the mustard. Let rest. Wash off the blade with a baking soda solution. Dry.
The patina could be transposed by spreading the mustard on a surface other than the blade & then dipping the bubble wrap onto it. Next you would apply the mustard dipped wrap to the clean blade, but only gently depress it in this case.
Ok... then after that I polished the blade with a metal polish, Wenol. This evened out & faded the pattern. Then I did another mustard patina over the first pattern, but applied with a damp cloth in abstract dabs. Then finished the same way.BEFORE USE: AFTER BEING PUT INTO SERVICE: