Answer to Michael Cooney

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Posted by Bengt Blomberg on April 14, 2002 at 15:50:22:

Hello Michael,
this is nothing to care much about. Sometimes an area in the mold becomes a little too thick layer of wax before the lay up. Then styrene or air enclosures can evaporate outwards instead of inwards as normally and leave those tiny holes. Sometimes in such areas water molecules can enter into a polyester molecule and cause a so called disk crack. This is because when a certain amount of water molecules have entered they causes a "black star" effect where the polyester molecule contrapts which such force that the water molecules are compressed to form a water drop. As this can not be compressed any more it causes circular cracks of a few mm diameter in the laminate This is pretty rare, but if you observe some, they are also of no importance and will cause no hydrolysis effects.
If this hull has not blistered before it will probably never do so! At least if no one convinces you to apply any kind of "moisture barrier". Just apply antifouling as normal.
Regards Bengt

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