well, what's his height?
I doubt wou'll be able to make him a balanced SF; you caould turn him into an ouside-focusedd SF though. I doubt training rebounding is the way to go for him, anyway - ID and IS could help him more, and you'd be able to play him at both PG and SF afterwards.
Now, the potential could also play a role, as he might cap soon, depending on the potential level.