Thank you so much. I am currently away from the location for the next 10 days or so. I will check to see if the chine also needs repair; I think I have a fiberglass repair kit that was used for a sunfish repair. I may have a question or two as I start the process but this is really really helpful. Have a great day and season!The pix aren't clear. Is the bottom (at the chine) also needing repair?
I'd get some 4-inch glass tape, cut it, leaving 2-inches additional tape at each end. Make three lengths, as you're going to be making one (1) thick fiberglass patch. (Fiberglass can also be purchased in small sheets, suitable for this repair).
Tape some plastic film across the deck inboard of the crack(s), and use a Flux brush to press resin into the tape. (And to punch-out the bubbles).
While sheet (1) is curing, add sheets two and three. Repeat while adding more resin and punching bubbles with the flux-brush.
Since the new patch will readily release from the plastic film, the cured result will have the same curve as the deck. (Although some Thixo will be needed for faring--with sandpaper--where the patch is to be inserted). Use more resin to secure the new sheet to the existing damaged deck.Trim the excess.
Turn the hull over, and using more tape and resin, approximate the underside to the cured deck patch. "Rough" the existing fiberglass hull for secure attachment. Keep the aluminum trim handy to get the correct thickness.
If any trim is missing, Alan S. Glos has spare trim. Advise dull or glossy finish when ordering.
The aluminum trim is strong, so it's important to the repair and the ends must be secure to avoid injury.
Editing my pop-rivet observation to add:While you've got all the necessary elements (rivets, riveting tool, drill, drill bits) out, search for rusty, oversized, or other "failed" rivets. A decent riveting tool was sold at Harbor Freight for $3.95, but those days are over.
Sometimes, there's no fiberglass present for the rivet to hold onto.This is a good time to press a glob of thickened epoxy into the "breech". While I regularly buy THIXO, I don’t use the provided mixer, which I regard as wasteful for small repairs. Leftover THIXO can be used to fair sharp edges of the aluminum railing--particularly underneath.
That glob can be drilled out to 1/8-inch the next day, cleaned up, and a new rivet installed.