5
Held upright, the pre-trimmed edge of the hull does not have a flat top. It is raised and flared outward. The cross-
section of the hull looks like this. Using the sanding block to span the width of the hull, sand off only the raised
area leaving the flare curve to make a flat surface to glue to the deck. DO NOT SAND AWAY THE CURVED
FLARED EDGE.
The 100 grit sanding block will sand both sides at the same time. Hold the sanding block at its center with two
fingers to apply equal pressure to each side of the hull. Grasp under the hull with one hand to keep the hull sides
from spreading apart under the pressure of the sanding block. Keep the block flat on the surface. Don’t let the
block overhang either end of the hull more than 1/2 inch to avoid rounding-over the tip of the bow or stern. Go
back & forth 10 - 12 times over an 10 - 12 inch long area. Then move to the next area along the hull overlapping
the last a little. When you get to the end, turn the hull around and repeat. Each end may need additional sanding.
A short video of this process is available online at: https://youtu.be/IqU9QfGCBBM
Turn the hull over and look at the flared edge of the hull. There will be uneven areas at the bow and stern. Use
the sanding board to even up these uneven areas to match the surrounding flare lines.
When done, there should be a rough flat surface all around the hull.
SANDING BLOCK
