Cracked F/G wing, Can the crack be stoped?

I really like the wing I just bought but it has a crack on the right front corner. I was wondering if the crack could be stoped so it wouldnt continue or if I could fix it all the way. its not REALY noticable but its not a mint condition wing anymore either. it also has 4 screws where there is supposed to be a center piece that goes down the middle well it doesnt fit. So can you smooth thoughs holes and f/b bondo or something over top of the holes? need help..