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After thinking some more today the word delamination is what I kept thinking. If it were my boat I'd "clean up" the area by removing the cosmetic covering and see where the bond broke and try to figure why. Then I see where Gary had the same suggestion, that's scary to think there is another mind out there that thinks like mine. Anyway, it may be that that area is cored (it looks like it) and that the core material comes too close to the edge (where the crack is). That would cause the upper glass to pull away from the core material. There should be an area of solid glass next to the core to bond the layup's (inside and outside) together. If you think of a phone book as plywood and you bond fiberglass to the front cover and rear cover then pull on the glass the book would open (delaminate). Now if you bonded the covers and say an inch beyond the edge so the front and rear cover glass bonded to each other with glass the thickness of the book then pulled on the covers it would not open (delaminate). Anyway just something to think about when you go to fix it. When it comes to most things that break from cranes to bridges to rockets it's just a little engineering oversight. Bob
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