A. Brush gel-coat or resin on raw glass.
B. Make a template of the opening out of thin cardboard.Align the scoop opening with the rivet holes.
C. Cut sheet of .060" thick aluminum slightly larger than the opening. Roll a gentle contour into the sheet.
D. Get neoprene C-section tubing, cover the scoop opening edges.
E. Through-rivet scoop and aluminum.
F. Forget fiberglass mess forever.
Optional: anodize black like this:
