[quote=erice]alloy corrodes and hardens in all environments
i seem to remember finding some dodgy looking heads on my 5.2 head? plate when i bought the boat
(nacra seem to have center-peened? mine which left a tiny, raised, easy to corrode ring)
so they got drilled and replacing with new solids and flattened with a sledge hammer as backplate and medium hammer as penner? aim to get the correct swell in 3-5 hits, too few hits and you risk bashing them flat/weak, too many hits and you risk hardening/weakening them, (former 747 sheet metal worker;o)[/quote]
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