Now that the stitching is complete, the seams need
to be "tabbed" so the tie wraps can be removed. Basically the step involves putting a thickened epoxy & wood flour mix
in the seams between the tie wraps. Once it hardens, the filler has plenty of holding power to remove the stitches and fill
Here's what the filler looks like. This batch was
slightly on the stiff side. You can apply it using a plastic bag and "pipe" it on the seams similar to a pastry decorator
and then use a spreader to smooth it out.
A couple of shots with the seams tabbed & the
I allowed the filler to harden and then used a combination
of a small block plane and sander to round over the seam. It's key that the radius is no smaller than 1/2". A smaller radius
will prevent the fiberglass from laying flat against the edge and leave air pockets under the glass.
The bow area will need a lot of filler. Make sure
it's stiff enough so it doesn't sag after it's applied. After the mixture has cured the bow shape can be created. Once again
it's critical that the radius be greater than 1/2". Any edges that need to be sharp edges in the final boat will need to have
the edge built back up using fairing compound and lots of sanding.
Here's some shots of the hull with the seams filled
and edges rounded over, ready for glassing.