After floating this free-flowing river in Jon boat and scraping many rocks:

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The riveted aluminum boat developed a slow leak which I believed resulted from chipping off old sealants I had applied to the rivets in the past. I therefore took everything off the boat and flipped it over to address the leak.

For prepping the surface I used a wire wheel on a power drill to clean each rivet and expose the bare aluminum. Then I used a propane torch to burn off anything I couldn't see. Finally I wiped the area around each cleaned rivet with an acetone soaked rag.

I used Bondo fiber glass resin and hardener which I painted onto the rivets followed by little squares of fiberglass mesh cloth and then a another coat of the resin.

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