If I had to do it again, I'd have bought the 3" orbital from @griotsgarage
The larger 6" orbital is great for large panels like doors, but we're talking about a MINI here. They call it that for a reason.
The smaller pad on the 3" orbital would make it much easier to polish areas such as the strip of metal beneath the headlights and around the trim-laden rear hatch. Compare:
Anyone want to buy a slightly-used random orbital polisher?

