Chad's right in the fact that you're not going to get hairlines by spray cresting. Other than that, I prefer it. With sprays, you get gentle fades from one ring to the next, with no worry about ugly brush marks.

Your standard Bohning crester is not well-suited for spray. It doesn't spin fast enough to eliminate runs.

For this, I use a crester that I made from an old sewing machine motor and a dimmer switch. That way, I can spin them as fast or as slow as I like.

Basically, it's all done with spray and templates. Get the arrow spinning, line up the template where you like, and give it a short spray to pain the lines. Not much to it.

A word of caution though: Spin it too fast an it'll fish-eye. Spin it too slow and it'll run. After a few tries you'll develope a feel for how fast you need to go to get it done.

JRW