[tevake]

Is your skiff hull made of ALuminum? In that case probably welding a shaped AL. bow is the way to go. If it is fiberglass, you can build up the bow shape with high density foam glued on with epoxy (west system is very good) thickened a little with milled fibers. Then shape the foam, glass on a strong skin. Lapping over into the surrounding skin of the hull. The bonding of the new skin to the existing hull if done well should be plenty strong.
Good prep on the surface to be glassed onto is the key, it needs to be clean and well roughed up to ensure a strong bond.
The cosmetics are a challenge Getting the surface of the skin smooth and fair and flowing into the hull takes time and many coats of filling and fairing, then the finish is hard to blend into the existing hull finish. Kind of like blending the new paint of a replaced fender into the surrounding old finish.

Cheers Richard