Eider: Filling the Inside Seams Posted on November 23, 2011November 28, 2011 by coffeeadmin November 23, 2011. The last couple of days I’ve worked 8 1/2 hours combined. I have filled all the inside seams with epoxy wood flour and then fiberglassed them. This is always a suck job!!!! Happy Thanksgiving to everyone out there! [Show picture list]