Whitening a skull; How to "bleach" bones

I have tried several methods but I really like this one. Cheap and doesn't make the skull brittle. This possum skull was in a friend's old boat. We were cleaning it out to sell it, chased off the live possum that was in it (which would have been a great video itself), and found a complete skeleton. I will try this out on a deer skull and/or hog skull next. It worked great on this smaller skull. There's nothing like getting a little head white.