Chief - sorry to be abrasive, short and quick on the negatives.
on the flip side of the coin, we would like to see photos of your project.
you said that out of three outings, you experienced no leaks, that is great.
And like Scooter said "if it ain't broke - don't fix it".
If you don't have leaks now, it is highly unlikely you will experience any
"gulley washers" in the near future.
My 1959 Crestliner has zero leaks but my 1988 Bluefin leaked like a sock
when I first got it. Even with SteelFlex on the bottom, it did not seal the
loose rivets. So they were addressed one by one to get the leaks under control.
have you filled it with water yet to just double check for leaks?
It is much easier, cheaper and less messy to address them one at a time
than to coat the whole bottom as a preventative measure.
3M-5200 is the sealant of choice for sealing leaks on the small scale.
Buy a tube of the
FAST CURE and keep it in your refrigerator - will last for years.
And after each use, clean any residue off the tube threads and out of the cap.
If you don't, it will cure and be a pain to use next time.
It will not stay soft like tooth paste when exposed to air and moisture.
Prime it - Paint it - and enjoy the summer!!
.