Back in 2004 or so, I purchased a 24 or so foot home made pontoon boat and trailer for $750. It worked ok; but eventually sprung a leak. I checked with a marina operator who indicated it was likely not worthwhile to try to patch the steel pontoons as they rust from inside. We recently drug it out and now I'm thinking about converting it to a dock.

I'm thinking about sandblasting it, then JBWelding obvious holes, then injecting that spray in foam insulation and then possibly painting with Rhino or Herculiner. Anyone out there ever done something like that? Would it work?

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