How I customize my unit (Video Tutorial)
Okay this can be tricky. If you are completely unfamiliar with tweezing your unit, TAKE. IT. SLOW. For the love of God, don't fuck up your unit. Tweeze a little bit at a time. If you have to, take it off your wig head and put it on your own head to see how it will look. You want to stick to a mostly vertical line, but not too perfect, totally straight part lines can look fake. You want to tweeze maybe 2-4 hairs horizontally for as far back as you want your hair. The number of hairs you tweeze side-by-side depends on the density of your unit. For this one I did about 3 hairs across, which is a pretty thin part, but I prefer thinner parts. Pull each hair directly from the root of the lace, but you MUST be careful to not actually pull the lace. Pulling the lace will create a hole, and the absolute last place you want a hole is in your part. Try to avoid cutting the lace until after you have customized your unit.
I use Sally Hansen Airbrush Leg Spray in Medium Glow. I make sure to secure the wig to my wig head with a safety pin through the stretch (NOT THE SWISS) lace. Make sure the lace is dry and clean and then holding the can around 7-8 inches away I spray in spurts in the needed area. I pay particularly close attention to the front hairline and where my hair will actually be parted. I usually tweeze both a center part and a right part, so if I miss any other areas it doesn't really matter. You should let the spray sit until it is completely dry, could take 2-5 hours, depending on how many coats (you only need one really) you do. The spray has sparkles and glitter that WILL get on your hair. Just use a wet towel or wash the hair to get rid of it. You may seal the faux bleaching by spray it with some strong hairspray, like Got 2 B Glued Hairspray.
Cut the Lace:
Whenever possible, save cutting the lace till the very end. It not only helps to prevent ripping holes while you are tweezing, but it also makes it harder for you to accidentally spray the hair when you are faux bleaching. In the video I had to cut the lace first for review purposes, but I DO NOT recommend doing so personally.