JAXAshby wrote:
protects what kind of fiberglass from what did you say?
snip
OK, so we got carried away. We were talking about a fiberglass *boat*,
which includes certain metal underwater parts, e.g. propeller,
through-hulls, rudder shaft etc.

You are correct, the zincs don't protect the fiberglass itself. It will
protect the boat.

The biggest danger to the fiberglass parts, other than collision, is
probably UV sunlight. The wax will help protect that. Washing will
remove salt (corrosive) and, properly done, protect the wax.

OK?

Tom
of the Swee****er Sea