Cat litter has been used to dry up oil from the wood. Especially in tank leaking into the fuse situations. Remove the motor and tank or plugthe fuel lines and burry the nose in the cat litter for a couple of days then clean and seal the wood. I seal all my planes with clear polyuerathane before covering. I spray the inside of the tank area and the floor of the fuse to the former under the TE of the wing and firewall and cowl cheeks. Good luck!