The peroxide does a great job degreasing as well. This is the method the WhiteBone Creations guy has used on probably thousands of skulls. I’ve personally used it on over 40 skulls.
I've done nowhere near as many as WhiteBone, and not quite as many a Diablo, but this video is about 90% exactly what I do. WB's peroxide soaking looked like it got the job done in one soaking. The 40 volume creme does the same thing, and takes a lot less space, but more time. Paste it on, wait overnight or a few hours in the sun. Rinse/brush it off. 2-3X makes it good.
I'll watch the video again, because I wasn't quite sure what the Mop N Glo was for. I think it was for easy cleaning later.
I personally like a high gloss finish so after it is white and dry, I paint it with some rattle can clear high gloss. Buy it at Home Depot, Wal Mart, or anywhere you can buy rattle can paint.
I've used Special Walnut stain as well, or whatever I had in the garage. Was it Walt Garrison that used to say "a little dab'll do"?
Good luck!
Oh, full disclosure, I've done whitetail skulls and turkey spurs, but never any antelope.