It's pretty easy. Remove the nock, or tape over it. Tape around the arrow where you want the cresting to stop, and then tape down the arrow so the overspray doesn't get on it. I would use a good lacquer and spray evenly. Let it dry, and voila. There you have it. The largest problem w/ doing this, as the duc man so eloquently put it, is most glue "melts" the paint. Now, if you don't use too much spilling out the side of the fletch, it's not noticeable. Or, you could use fletching tape. That will work too.