After reading this thread I decided to get my rotary polisher out and give the car a going over, only tend to user it about once a year. 4 1/2 hours later the car has been wash then polished using G3 compound and the rotary polisher then a coat of autoglym high definition wax. Think you definately get a better shine than by hand. Already for Saturdays party now!
If I'd give one tip, keep the polisher head nice and wet, so it doesn't grab or burn the paint and WEAR WATERPROOFS, you may look a bit daft but a wet polisher head spinning at 2-3000 rpm will spray water and compound everywhere!!! I wear an old waterproof jacket and trousers and work boots and by the end I have more on me than the car!!!