I think I'm ready to glass the hull. I have sanded it smooth and got rid of the sharp angles. I don't understand part of the directions and wanted to make sure I'm ok. It says to round over the joints to a small radius of about 1/4" (5mm). How do I measure this "1/4 (5mm) radius" ?
a small radius of about 1/4" (5mm) is about what would about match the curve on the edge of a #10 flat washer--the one I have here is 11 mm in diameter.
Enjoy the sanding--it is a therapy that you don't have to pay for.