I’ve used a marine grade epoxy based wood stabiliser (very runny so
impregnates things with ease) with good results on dried animal dung
pendants, turns the whole thing effectively into a cellulose
reinforced plastic bead.
The 250ml two pack I bought three years ago is still going strong.
If you need the brand let me know and I’ll see if I can track down
more than just a name for you.
Cheers, Thomas Janstrom.