I just finished my first hws sup. Just this week, on the first ride there was a leak in the "finger box" in the middle, there was maybe .5 liters of water inside the thing. I drilled a hole to the tail end of the deck and let it dry in a warmed garage for 3 days. Seems that it wasn't enough, now there's darker patches of wood & some whitened glass around the deck. The decks are made of pine strips (50 mm x 4 mm, 2 layers, laminated diagonally).
How to fix? Is the only way to strip all the glass from over the wet spots, or could small holes / cuts in the glass be enough? In any case, what's the fastest way to dry the wood, should I try to bend a tube or something inside the vent in the tail end and attach that to a blow dryer or something? Or just warm it from the top?
This sucks, had just gotten into sup-ing & don't have another board for that... yet :)
I live in a desert climate, so drying isn't a problem for me. But I think you need two vent holes (at opposite ends) to dry it thoroughly, and some guys have used an aquarium pump to move air through the board.
The darkened areas of wood will likely stay dark, even when dry, due to staining. The only way I know of to eliminate that is to replace the wood in the dark area with a patch. As far as the "whitened glass", I don't know, I've never seen that. I guess my first attempt would be to sand it down to the weave, and re-resin over that area. If that doesn't do it, then I guess you would have to cut the bad glass out and glass a patch over, feathering the edges like a normal ding repair.
You should spend some time over at the wood board forum http://www.grainsurf.com/forum/index.php?sid=6a66c6efc815b0c99215aebc36077536, and use the search function. This subject has been discussed in depth over there. Or start a new thread, if you'd like. But same as here, pictures really makes a big difference if you want some specific help / advice. Otherwise, its just generalities.
Hollow wood boards tend to drink water in through the tiniest of holes or cracks due to the vacuum created when the air inside the board cools down and contracts.
(BTW, I made the corrections in your original post as you noted. You can edit the first post yourself, but the edit botton isn't at the bottom like it usually is, on the first post its always at the top left corner, so a lot of people miss it.)