Acetone may not penetrate real deep as it dries fast, but as you clean it up, the oil may migrate to the dry surface and can be cleaned. It may take several tries to get it cleaned. let a day or so go between cleaning. If it is a real nice board, it may be worth it. But with the cost and danger of acetone, it might be cheaper to buy a new board. How thick is it? It might be thick enough to plane off a lot of the oil soaked wood. Don't burn it inside!
IMHO