Do you use polishing (rotory or DA) often nick, or is this a first time as a whole?
I detail my mini often, by hand, and have considered to get a tool for some time as I have scratches and some swirling on the roof (black in colour!!) which I cant get rid of by hand.
Great results though, and definately a nice thing to do.. make sure she looks after it now haha!
My mini after a detail:
