Just a suggestion on the peroxide thing. You would probably have better luck if once you put the peroxide on you put it in a dark room or closet. Peroxide will react to light it will release an oxygen atom leaving oxygen gas and water. This is why peroxide is stored in dark bottles. It should bleach bones very well. Ive never done it but I do teach chemistry and peroxide is a strong oxidizer.

"Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity" Martin Luther King Jr.