RE: Waterproofing feathers???
I use a combination of silicon spray, "camp dry" I believe is the brand name. spary several light coats on my feathers, and then the ones that go in my quiver also get coated with the fletch dri powder. This system has worked great for me, even in a down pour.
TAKE YOUR KIDS HUNTING AND YOU WON'T BE HUNTING FOR YOUR KIDS