Eider: Knocking Off the High Spots Posted on November 2, 2011 by coffeeadmin November 2, 2011; 9:00 am – 1:30 pm. Today, I took a longboard with 40 grit and hit the hull knocking off all the high spots. Then I applied 410 fairing compound to the complete hull. I also put the first coat of varnish to the transom [Show picture list]