Join Date: Sep 2008
Location: Victoria B.C. Canada
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The blue layers are colored gelcoat which is used so the crew laying up the hull can see more easily that they are wetting out the layers. The center section that is translucent has no gelcoat left on it by the looks of it. I don't think, from the picture, that there was any paint on the hull at all. The glossy white on the left and right side of the picture looks like gelcoat to me. I think you sanded way more off than necessary. It actually looks like everything you removed was gelcoat.
Living aboard in Victoria Harbour