Not much reason to stabilize stag, but it and horn can be done.
Fellas, don't waste your time trying to do this by yourself.
No matter what you do, you will only experience sub-par success with sub-par chemicals.
When you send your stuff to the pros, it gets done correctly and the cost is almost insignificant.
Spend your time making BETTER knives - not figuring out how to do something that will never be as good as you want it.