I forgot to say that the only place I've been able to find the 20% peroxide has been in beauty supply shops. Also, you need to use the professional grade Lady Clairol hair lightener (bleach), and again the only place I've been able to find it has been a beauty supply shop. Sometimes a beauty shop will be willing to sell you the 20% peroxide and the professional Lady Clairl lightener.
Remember to never apply or use the 20% peroxide without using ruber or vinyl gloves! And add the amonia very slowly (one drop at a time) or the reaction will be too fast and you will damage the feathers.