An historical boat can be worth the effort, but otherwise, there must be some other special and compelling reason to deal with the " fastener disease " issue. I am completing one at the moment and I have learned more about me than anything else with this one ! Wet your finger , swipe the halo , go to tongue, and OYE ! Press the plank inside with your thumb , where a tack is in the rib. Do a few at different locations especially where you suspect water has sat. If you hear little snaps, the tack shaft has let go and you have no fastening. Varnish separating under the rib at the plank contact can sound similar, but you will see and feel the plank loose at the interface. When and if you strip it be gentle or you may end up with parts all over the floor. GOOD LUCK and buy the big bottle !