I hope everyone is in good health and had a great summer! I wanted to keep this forum going by sharing some repair methods for fiberglass. Simpson Strong Tie is a two-part epoxy that works well with fiberglass, metal and concrete. It is used for fall protection anchorages in the construction industry. Amazon is a great source for the purchase of this material.

This was used to glue a horizontal split on one of the lower panels of my Hall GTC (there was no back side access for traditional fiberglass repairs). 24hrs. later I applied the plastic filler. I also wire wheeled the rust off of the top gutter screws and used the Simpson product to seal this as well. The epoxy will not shrink or crack over time.

I tried to upload some photographs, but do not see them here. Hope to hear from you guys soon.

Here is a shot of the gutter I referred to.

Thanks for the tip, Vincent. I've been trying to decide whether or not I want to use standard automotive gutter filler for this particular job because the gutters on mine leak as well. Did you replace the fasteners?

As for blind fiberglass repair, back in the late 60's when I worked in my dad's boatyard, we used to accomplish this by making a hole large enough to pass a piece of wetted mat through with a string tied around a cardboard pull-back backer to "push" the glass up against the backside of the damaged part. Back then we used polyester resin, but today it would probably be epoxy because of the superior strength. After the patch had set up, we would grind any protruding fibers flush and then use a two part epoxy filler to fair in the surface that would be be sanded and faired when workable. We used oversprayed Gelcoat to match the skin color of the part and sand it down to about 600 wet or dry paper. We only did this kind of repair to land vehicles, never on boats or aircraft! I was pretty good at it, to the point where most people couldn't tell where the repair was.

Keep on posting! Our site has been very quiet for too long!