[rcnight]

I agree with everyone - epoxy is the only way. There are tons of sources. Do a google and I'm sure you'll fine one close to you. A trick I learned on my last boat build will save you alot of finishing time and you could probably get away with leaving the boat rightside up. If you don't vacum bag, this may work. Find a thin flexable board (luan ply or masonite) and make it non-stick. Layup your patch work in reverse (finish layer down first)on the board and secure it to the work area. You might need to use small tap screws or wedge it up in place. The idea is the non-stick surface of the board makes a smoother finish, thus less finish sanding and holds the patch in place. Good luck!