I remember reading of a company that installed some sort of copper foil to
the hull, but that was a few years ago. It wa expensive IIRC, but did last a
long time.

I have wondered about fitting some sheet copper to the bottom of the keel,
because for some strange reason, bottom paint never seems to last as long
there.

"Roger Long" wrote in message
...

I think this really works. I wonder if there is some way to copper sheath
a fiberglass hull?