Re: All the way down to wood?
Welcome to the Forum!
Please go to the USER CP link in the upper left and update your location -- much depends on whether you live in Alaska or Brazil. If the latter, I personally don't recommend oil finishes as they can mold or get sticky in the tropical sun.
Also tell us why you decided to not go with a similar product like Le Tonk or whatever.
Any way you slice it, for the outside / topsides you'll probably need to wood the boat. For the interior probably ditto, as otherwise you'll have blotches of light finish in between black oily areas....
"The enemies of reason have a certain blind look."
Doctor Jacquin to Lieutenant D'Hubert, in Ridley Scott's first major film _The Duellists_.