You guys are right............it is a two part epoxy call Flex-Coat.
Blaflair2,
They make to different formulas a thick one and a thin one. Use the thin one. Color the limb to be feathered a dark color to keep the wood color from bleeding through. I didn't and had trouble with the osage showing through, but after a while in the sun it will darken. I start at the tip end of the bow, apply a very thin coat for about 3" lay a feather down and brush on another thin coat over that feather. lay another feather down apply a thin coat, then keep repeating. do not brush the feather much and break it apart. I use a very soft hair brush. if it breaks apart it will not go back together and the more you brush the worst it gets. I can't stress enough to apply a thin coat with the least amount of brushing possible. Continue moving down the limb 3" at a time layering the feathers like shingles on a house until the whole area you want to feather is covered. It goes quicker than you would think. Just make sure the feather stays down against the bow. some will tend to cup up and create an air pocket between the feather and the bow. You will have time to do this because the epoxy gets tacky after about an hour. I just wet my finger an gently push it down until it sticks. Remember thin coats. After the epoxy has dried, I apply another thin coat over the top of the feathers. The epoxy is self leveling therefore you end up with something that looks like feathers under glass.
Hope this helps.......post your progress, love to see how it comes out. drop me a line if you have any questions.
DBar