I have an older BluePoint 3 inch buffer that is absolutely fantastic. It is the right choice for headlights, and other detail oriented work. Wonderful for aircraft repairs, to blend new paint with old and avoid rivets. If I remember correctly, it's top RPM is about 3000. It's certainly not the speed of a die grinder. Has plenty of power too.
Not the right tool to do large surfaces. But perfect for things like door and window pillars, jambs, edges, etc. I even polished my Titanium bicycle frame and eventually the fork to a mirror shine with it!
It looks much like this Harbor Freight tool. No clue if the HF tool is any good. (I will have to get one though)