Well, I just had the tops and leaves for the dining room table I'm building surface sanded. I got them home and set them on my ping pong table, thinking they would be safe there. Alas, the cat went and peed on one of the sections- . Fortunately, I found it before it dried, but unfortunately, not before it had soaked in. Cleaned it up with water best I could, but there's still a slight stain. What would be the best way to get rid of the stain? The wood is red oak and I want to finish it natural (i.e. no stain). Thanks in advance.