I've been posting on the topic over at the Vetric Forum. Vectric Forum • View topic - No luck with sandblasted woodgrain made on CNC You may be pleased with the woodgrain a router will render. Many people are satisfied but I'm not pleased at all. Most of the signs are larger and it's with these where the router effect downgrades the image quality.
I personally don't think there is any way a router can come close to sandblasting. But you might not be as critical as I am.
[url=http://www.normansignco.com]Norman Sign Company, Norman, Oklahoma