I Put Mustard, Vinegar and Alcohol on my Backpacking Knife and this Happened... 

What is a patina?

Ur kitchen is kinda badass. Like the knife too

Good video. Thanks

After vinegar patina then use mustard patina and you will see your desired result.

you can add lasting stripe design using saltwater , 9v batt, and a q-tip after using vinegar patina

I had similar results with mine, except slightly blotchy (white vinegar) and tried to get darker with instant coffee soak, but it only got darker in the areas that were already the darkest. There’s a terrible smell with that too. I’m using your apple cider vinegar method at the end to hopefully get back to a more even color.

Mustard is "nasty"? I suppose you put ketchup on your hot dogs? Lol. Here's a little tip, you can use ketchup on your knife if you don't have any mustard. It works just as good. Did you try the mustard after the cider dip? I wonder how if that would do anything.

Do we have to boil the ACV?

You did it backwards. Do the ACV first then do then mustard. Leave the mustard twice as long as the vinegar. So the patter will show.