I've used a penetrating epoxy, stuff is horrible / miraculous. It's about 70%VOC. It really, really penetrates, seeps into the wood like water into a sponge. Then it hardens, like stone. That could be a good way to displace much of the air in the block, and make it less buoyant too. I'd still use a vacuum pump to draw out surface bubbles. And I'm positive the was a box around the stump when the urethane or epoxy was poured in around the log.
THEN, ENDLESS grinding and polishing.
__________________
Be Just and Fear Not.
|