Tom,
Your son is right!

Epoxy and fiberglass is the way to go. With aluminum you have to think about scratches, abrasions, dents etc. and with Epoxy and fiberglass, repairs are alot easier and you can paint it, or leave it bright with top coatings of a Linear polyurethane clear. I built that flats boat out of marine plywood and epoxy and fiberglass. It has strength you won't believe! Also I can't believe that there won't be a problem of the aluminum pulling away from the wood sooner or later, and that is if you can find it in a 5 foot width. I also think that bright wood sides and a tan top would look more retro or period, even though I realize the originals were aluminum.
Auntie "M",
A flats boat is a boat that is used here on the West or Gulf coast of Florida. It is usually wide(mine has an 8 ft. beam) and will float in very little water(Mine will float in about 2 inches) . The water in the gulf of Mexico is very shallow. It is described as dropping one foot in depth for every mile you travel out. Of course there are channels and exceptions, but the inshore fishing is in and around sand and oyster bars. Propeller repair and replacement is big business here. This shallow water does not keep the big fish away though! Sometimes you sight fish and look for their tails splashing to locate them.
Thanks to the 2 of you for writing!
Rog...
Always do right. This will gratify some people, and astonish the rest! Mark Twain