You can take this for what you think it is worth, but I have a friend who is a retired bodyman/painter. He tells me that when he was younger he learned to paint from a painter who claimed his first job was as an apprentice painter in a auto plant, and his job was to pinstripe wheels. He did this by placing the wheel on a spindle, spinning it, and holding a brush loaded with paint against it. Can you imagine doing this for a full day, day after day? Allen