[quote=MN3]wd40 is not petroleum based - i think it is actually fish oil based (but not sure if that is accurate)
It doubt will not hurt your gelcoat - but i also don't think it will do anything to avoid corrosion where it counts
tangs and stay anchors break where there is a lack of oxygen (at least for me) - every one of my tang / anchor failures (3 so far) has occurred where they are covered in glue/glass and no product could ever get inside to help
I think the best thing you can do is:
wash your boat after use
dry off and cover
be pro active with your stays/ if you have a boat where the stay anchors are accessible, i would replace every few years
inspect often and be prepared for a failure on 20+ year old boats[/quote]
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