Bronz..
I can' smell it on my fingers...and the guys at work call me the bloodhound when it comes to odors. Ducks bum is just a term...it is actually a gland at the base of the tail on a duck....on the top side....not the business end....LOL.
I really think it will work VERY well, it is naturally occurring, if it does have an odor, deer have likely already smelled it and are familiar with it NOT being a threat and it has kept ducks, geese and all waterfowl dry for centuries. I have found a tiny dab the size of a BB will dress half a dozen flies easily....so it should go a long way on fletching. I will do some up with CDC when I get a chance and let you know how good they are. I have both Wild Turkey and Canada Goose primaries to work with, so it will make an interesting experiment.