I got an old Royalex canoe that has a lot of white showing and one soft spot in particular. I was wondering what’s the best practice for fixing this? I’ve seen a lot of YouTube videos for patching of Kevlar and fibreglass canoes but nothing for royalex anymore.

I have settled on west systems gflex two part epoxy for all royalex repairs. I once saw a promo video of theirs where they cut a plastic boat in half, glued it back together, and dropped it off a bridge on it’s stem to the pavement below with no damage, very few resins allow flex like that.

What do you mean by "soft spot"?

My Royalex Wenonah Sprit 2 has 20 years of my beating up on it, and I bought it used from an outfitter to begin with!

Mine looks a lot worse than yours, but I haven't considered it to be needy of repairs to the Royalex portion of the canoe (I have replaced thwarts and seat brackets).