Kayak repair

I'm just guessing but it sounded like Tinker was looking for a quick repair idea with minimal time, tools, and expertise required.  That being said, without a doubt a plastic weld would be the gold standard repair method.

I got the impression Tinker wanted a fix that would look clean and not "repaired".  A small 1/4" hole or smaller could easily be welded to look natural. A 1" hole, not so easily.

Yes, yes, you're both right.  I'd like to not make a career of it and I want it to look good for the grandkid, but all of the suggestions have been for good ways to seal a large-ish hole that's no longer needed.  If I don't use some of them, someone else will surely benefit from what's been suggested, so it's all good stuff.
 

How did this project turn out?
Curious which repair you chose to use.

Thanks for asking.  It's not finished yet - other things keep getting in the way.  I've welded a 2" disc of scrap material (from Wilderness Systems) from the bottom/inside to ensure a proper/permanent seal.  I haven't cut, shaped or installed the "plate" on the top side for good looks.