I have a piece of deck furniture that I'm making out of well-dried douglas fir. I'll probably finish it with some sort of marine poly or SPAR varnish, but I was wondering if it would be OK to douse it in something like Thompson's Water Seal first. Would that help with longevity? Would the polyurethane or other varnish still stick OK?
One way to find out, of course, but I just wondered if anyone already knew the answer.
Thanks.
Jim Kirby