Rough-up the surface and overlap the break by a few inches. glass cloth to match the original strength of the broken ABS. You're likely looking at around three layers of typical 6-8 oz. They flex enough that they won't delaminate and pop off the way most normal resin would. It is a thicker, more flexible resin (Old Town has it or you could use WEST epoxy 'G-Flex' resin from Gougeon Brothers). You repair this stuff with multi-layered fiberglass patches and epoxy resin - but it's not typical boatbuilding epoxy. The cracks in the hull are a somewhat more complex project. The seats and decks are probably still available from Old Town and assembly is a matter of pop rivets and stainless bolts. I can't tell from the photos, but either it was a red canoe and was later painted black, or somebody scraped off most of the red outer skin, exposing the ABS layers (which would be very bad). It will start with XTC and the last two digits are the manufacturing year. Judging by the seats, I would say mid-to-late 1970s or after, which you should be able to check on the serial number molded int the stern on one side, just below the gunwale. The gunwales, decks and trim are rigid vinyl (gunwales have an aluminum angle inside for better strength and stiffness). It's an Old Town 'Penobscot' model and it is made from Royalex (vinyl skin, ABS structural layers and a foam core).
