On Wed, 15 Jul 2015 19:45:21 -0400, Alex wrote:

Rocks and coral reefs are problematic because of the sharp edges that
can slice open aluminum but usually with less overall damage than
fiberglass, and much easier to repair.


Aluminum welds are not very forgiving so the repairs will never be as
good as the original.

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I'm having trouble understanding your assertion about aluminum welds.
Aluminum boats are welded at the factory during their original
construction and are very strong and durable. A properly performed
repair weld will be just as good as the originals.

Were you referring to the skill level required to do a proper weld?