Buffing polishing advise needed

yeah I'll be color sanding then buffing, I know I shouldn't have waited but the thought of sanding AGAIN was a little hard to stomach until now. I've seen what a power buffer can do to paint and that's why I'm asking. I thought that the little 2 handed buffer things would take a long time but I'm scared of burning through my new paint with the huge angle grinder type.
. Thanks