"Capt. Rob" wrote in message
ups.com...

You can see bright sunlight through an inch of fiberglass, Mooron. I've
been aboard some old-time Albergs and such and you can see light. Means
nothing of course. You can also see light through bullet proof glass. I
helped install a radar on a Sweden last season....plenty of light
coming through the hull of the proven blue water sailor as well.

That light coming through depends on the woven material. Fibreglass matt is
usually white, so it reflects all light. The reason light gets through is
because the weave has gaps in it. The reason there are gaps is that the
glass isn't laid up properly, it is stretched beyond specification.

Amen!