the salved edge of the fiberglass tape is probably the least pleasant part
of the whole kayak building process. The woven edges are rather thick and
need to be feathered into the surrounding surface which generates a rather
large volume of fiberglass dust.
Furthermore, sanding sometimes makes the weave of the glass visible even after the new filler coat of epoxy is applied on top.
NOTE: This technique is also particularly suitable for stitch and glue kayaks where all joints must be taped and feathered smooth. Ask any plywood kayak builder and they will tell you that achieving a clean transition without sanding into the surrounding fiberglass or plywood is probably the most tedious task of the entire project.
There is a way to minimize all the dust with this little trick:
that I had used clear masking tape on one side of the seam and a paper painter's
tape on the other. The paper tape makes the edge more visible but the clear
tape is stronger.
scored fiberglass will break off very easily and cleanly.
cut is made exactly at the edge of the masking tape or a little bit towards
seam. Instead of sanding all this stuff off, it has been surgically excised!!
Now re-mask and apply an epoxy filler coat. Any subsequent sanding will
be cutting more into the hardened epoxy rather than the fiberglass.
Use this technique to trim the abrasion patch of fiberglass on the bottom of the hull as well. This will instantly eliminate any struggle with unraveling edges of the fabric as well as sanding all the mess down.
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Last page update: 11 January 2020