I was going to wait until I finished this fox before I shared it, but... I'm coming across a rather unique issue. He has a porcupine quill lodged in his skull. I have absolutely no intention of removing this (even if I could) and I was just going to degrease and display the skull as-is. However, the teeth are pretty nasty looking and I was going to dip them in peroxide overnight to fix it. Then there's this tooth... it won't come out. How do I go about bleaching out this tooth while not damaging the skull or bleaching out the quill? I've macerated it and soaked it in ammonia for a week now... and it shows no sign of dislodging itself.