Porcupine quills are hollow, and filled with air. Cut the ends off the quills, it will relax the barb on the end of the quills, spin it while pulling it out helps a bunch. It still hurts like @#$& though.
It's not the first time, I've protected my hair, in just such a manner.
Zowie Chuck, your work is absolutely fabulous! I have always appreciated seeing traditional quill art. Been tempted several times to give this craft a try, but like a lot of things, never find time. Almost stopped the truck last fall to recycle one of the many road kill porkies I have encountered. Too many flies on that one! Maybe the next will be fresher.