Benjo,

You will receive many ideas from this post. I just want to throw one at you. You stated that it was rivited which you considered a downfall. Might I suggest that you take it to your nearest dealer that handles the spray in truck bed liners and ask them to spray you a liner on the inside of the boat. I would have them cover all of the bottom and sides. This will just about take care of any lose rivits that may spring a leak plus it will give you more traction on the inside plus easy to keep clean. Just hose it out. I think they can spray it on in layers to build it up in thickness. I would only do this on the inside. If you spray the bottom on the outside it would give the boat too much drag in the water. Just a suggestion.

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Warren