I like how you did this.
I read up on doing the same through this forum and got a little overboard with my BK11.
Stripped it, did a brown mustard patina (that looked great)
Tried the potato, the onion and even the BBQ sauce.
Then I resanded all of that and soaked it a vinegar and steel wool solution that was already a month old (bad idea btw)
I soaked it for 3 days. It was a two tone dark grey and started to form a hard film on the flats as if to recoat it.
Sanded the flats off cause I wanted it smooth and it pitted. I mean pitted bad. Sanded it again with a more course grit and still couldn't remove the pitting.
I would call this an epic fail but was willing to risk it cause it was only $40 so who cares.
I would recommend BBQ sauce only. It creates a blue patina. That looked the best and got a ton of compliments.