So should I be able to polish out the hull with the same Perfect-It or do I need to go to the Finesse?
Eric, How'd your boat turn out? I think your boat is painted with Awlgrip. I wouldn't use heavy cut on Awlgrig. I'm speculating on your hull finish. I'd call Craig and ask him.
Perfectit III will take out 800 grit scratches easily, I don't know about 100^^^.