Don't know if you already did your repairs, but here is what Old Town said:
For any cosmetic repairs, as long as the damage does not penetrate completely through the hull to the point where it is leaking water, you can patch up your cracks, deep scrapes, and gouges with a 2-part methacrylate...
Hi! I am in Portland, Maine and have acquired a 1974 Camper 16 with beat-up white vinyl gunwales. I'd be very interested in connecting with the person with the salvaged gunwales. Thank you!
Hope you had a great trip.