Fiberglassing and such

The directions are not real clear why you shouldn’t fiberglass the transom (the slant aft end of the hull) . Is there a reason for this? I think it would make sense in doing so as it also increases stability in that area.

Do you fiberglass over rubber bumper or is that placed after you have glassed the hull?

Whats the best way to make a custom bumper? I was thinking of making some kind of mold (not sure out of what and maybe an injection type mold) and using some RTV as the raw meterial for the bumper.

more to come later.