40 volume bleach don't remember the brand and redye was just back to my natural hair color what ever the salon used.(I had hair stylist dye it back becuase I didn't want it to look weird.) I did the mac atleast 20-25 times and jerry G 3 times and I did it bleach, bleach, dye, bleach, dye. I don't think the redye is the important part its just so you don't have white hair, I had another job interview between one of the bleaches which is why i dyed back twice instead of once, your call really. And don't worry with the questions, ask away, I was in your spot once so i know how it feels.
I would say just do the mac as much as you can handle becuase it starts to hurt your scalp, take a day off every now and then, and do the jerry g method atleast twice but make your last one as close to test day as possible. Also cut your hair to 3/4"-1" giving them the smallest sample possible but do NOT go under 3/4" or they will not take it from your head and when i took it they wanted to take it from my body so have am excuse ready as to why your body hair is short.