Re: welding leaking rivets?
Rivets are an easy fix without welding or using goo to stop leaks:
1989 Sylvan Boat Rebuild Part 4 - YouTube
Welding the rivets in that Tracker would be a big mistake. First off there's a lot of urethane foam in your boat (or should be) like this:
Secondly, there's a rubber/latex gasket material in the seams of your boat that will burn. When this gasket material burns your boat will leak 100 times worse than a few leaky rivets.
Fix your leaking rivets like in the video and you'll be good as new without setting fire to your boat.
