Don,
You will have fun with this. One comment, for
fiberglass use two part epoxy glass for repairs if you can-
The type you find in most auto part / repair stores is a polyester resin and catalyst formula is is really difficult to make work well as it kicks or cures too quickly and does not adhere to many surfaces.
A source is RAKA Epoxy or West Marine
Raka is what I have used a lot of and you can add wood flour (fine dust from wood) or other fillrs to make a stiffer mix for vertical repairs--pot time is longer. That is it does not set up quickly, but when it kicks or cures it does it with gusto. Another plus--no noxoius fumes or odros to speak of.
Good luck, nice blog by the way
Gary