Although I've never had that problem with fuel in the fuselage, I've heard that K2r availalbe in a lot of grocery stores can help soak the fuel out of the wood, with a few applications. Here's a link that describes this product.
http://www.vermontcountrystore.com/s...rchid=inceptor
But you should be able to find it in many grocery stores or hardware stores. I've heard this stuff almost works like magic, so give it a try.
Good flying.
Tom