I'm planning on restoring a sailboat that was given to me. It's a 14" Puffer, main and jib are in good condition. Brand new DB and rudder. There is a missing chunk in the gunwale. (the part of the boat you sit on) It looks like it has previously been worked on with some sort of resin. What do I need to buy to fix this? Additionally, what kind of paint can I use on it?