i cant remember the whole article from shooting times but it was something like this, put skull in a bucket of cold water for 24 hours to remove any blood stains, skin off the head and remove as much of the inside's as possible , boil skull in a sauce pan [ non aluminum ?] keeping the antalas out of the water , add a couple of table spoons of soda crystals and boil till the flesh comes off , when all the flesh is off , put skull in a bowl and cover the skull with cotton wool soaked in hydrogen peroxide solution and leave covered over night which will really whiten the skull , i bought the sod