I’[ll second Jim, the only things that suck up more water than EPS are balsa and bricked camels.
A story:
Once opon a time, there was this guy, I’ll refer to him as a highway surfer. He kept his giant EPS longboard on the roof of his car all the damned time, and it was at least as long as the wee Ford Escort he had.
Including taking it through a car wash. Which removed the fin and finbox quite nicely. And a month later,. roughly, he contacts me to fix it. Board still on top of the car for all that time.
Won-der-ful. Giant, ugly, crap waterlogghed longboard, Just what I needed, that and scabies.
Now, this foam has a structure not unlike puffed rice cakes, wee bits with lots of air in between them. You can pretty much blow through it. Well, I say ‘air’, in this case it was water, plus highway smeg, grit, car wax, car wash detergent,what have you. I am not entirely sure it would have floated by the time I saw it. I put it upright, tail down, for a couple months to drain and even then there was still a bit coming out. But I was sick of the board and sick of his ‘when’s it gonna be done’ whining. He had kept the finbox and fin and I glassed them back in, bedding the box in epoxy and cloth and quite a lot of it, tied in to/lapped on to the bottom pretty well. And he got it back, I did the job cheap just to get it and him out of my life.
The next time it came off the car, it went into some rocks. The fin held up, but other dings. I was busy. For all I know, it’s still on top of his car somewhere. Not my problem.
In any event, yeah, drain it. Use gravity and time. Don’t even think about a heat gun or similar. That will get very ugly very fast, the air in it will expand and give new meaning to the term ‘delamination’.
hope that’s of use
doc…