Chances are the holes are caused by electrolysis. Verify that you don't
have a ground from the battery attached to the boat aluminum somewhere and
using that as a ground loop for accesories. Everything should have its own
ground wire to a junction box that is connected to the battery. If you keep
the boat at a marina make sure someone else does not have a bad ground as
well if you can.

Rivits won't work for long as they will leak due to vibration. Spot weld
and grind down smooth.

--
Tony
my boats and cars at http://t.thomas.home.mchsi.com

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wrote in message
oups.com...
Am looking for advice (theories) on fixing pinholes that have developed
in the pontoons of our 24-foot Escapade pontoon boat.
There are several areas involved, probably from electrolitic action.

Our plan of the moment is to drill out each pinhole and pop in an
aluminum rivet that's been dipped first in two-part epoxy.

Are there other good, better, best ways to deal with the problem?