I recently purchased a lace closure to use for my wedding sew-in. I had someone install it for me but to avoid extra costs to customize it, I decided to bleach the knots my self. The process is pretty simple, I was able to figure this out my watching other videos and reading blogs online.
You will need lightening powder and developer. I purchased sample sizes from Sally's of both. The brand shouldn't matter. Each video I watched used a different brand. I wore gloves on my hands and purchased a mixing bowl and brush to use.
The whole process was pretty quick and the results were good! Check out the whole video on Youtube or check out the link below: