HOW TO MAKE A BLEACH PASTE
Measure ¾ cup baking soda into a non-porous (metal, glass or ceramic) mixing bowl or disposable dish.
Add a capful at a time of bleach to the baking soda. Stir and mix with a metal fork. Continue adding bleach gradually and stirring until you create a mixture with a paste-like consistency.
Adjust the quantity of bleach to thin the mixture to the desired consistency: Thicker paste will stick to the sides and undersides of an animal skull, but a thinner paste will flow and smear more readily into cracks and crevices.
Apply the paste to the animal skull using a small craft brush. Thoroughly rinse the brush immediately after use to preserve the bristles, or use a disposable brush.
Let the paste sit for an hour.
Rinse the skull in water to remove the paste.
Reapply paste to portions that didn’t get bleached white enough the first time, and repeat as necessary.
(above) This bear skull is ready to be cleaned. Most of the flesh has already been removed. (below) This finished bear skull looks great displayed on a wall.