The hair bleach paste to me is by far the best way to go. Forgot to mention though that you need a sealant to apply once its finished to stop yellowing over time. I use mop and glow. It works as a sealant with a medium shine, can be washed off if you ever need to do a touch up and reapply bleach, and lastly leaves the skull with a pleasant odor. Again not saying you have to do it that way. It just works for me.