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Old 03-12-2010, 18:13   #31
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Sometimes galvanized steel is punched to make catwalks etc and the galvanizing stops the rust on the coin shaped punchings - especially once they are encased in a carefully mixed waterproof concrete. Often concrete alone was used as internal ballast on west coast fish boats but having a more concentrated weight lower will improve your righting moment and leave you with deeper bilges.
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