this is pretty cool, thanks for putting up this link. It would be a nice way to get a truly personalized knife if you can stabilize your own wood for the scales.
I use acrylic stabilized woods (burls and oddly treated or dyed woods) for the pens and duck calls I turn on the lathe. If you just want to stabilize a piece it should be food safe. I think.
However, I've never used the stuff in this video. Might email them about it?