Like Mark, I seal my wood wake and top water baits with slow cure epoxy like penetrating epoxy of Devcon (D2T). After I have done my shaping and have epoxied the hook hangars and the lip in place. Then I can use needle nose vise grips to hold the bait while I work on it. I think it helps to heat the wood bait with my heat gun before I apply the slow cure epoxy. That helps it pull the epoxy in as the wood cools. You can't really get the sides of the wood grain to absorb epoxy but end grain will. This makes the end and tapered sections harder and on my 2 piece baits I get a really great wood knock like that. Of course you will end up adding or moving weights as needed and you have to be diligent about sealing each hole. Be advised that warmed wood will make the epoxy more fumey, use an extraction fan or I use a fan blowing across my bench to keep the fumes away.