Damn you guys know how to make something watertight!!
I remember my dad, uncles and granddad building a boat out of white deal planks, another wood (possibly pine) for the gunwales and all built around an oak keel. Each plank was hand shaped, steemed and fitted to the ribs that were also soaked, steemed and formed. My Granddad, being ever watchful for a bargain, managed to get his hands on a shedload of paint to colour it. Turned out to be water solluble emulsion...
Boat sank like a rock and had to be dried out before we could paint it with a more appropriate sealant
Good times hehehe