When i buffed my car i used Farecla G3 cutting compound
Followed by 3M Perfect-it II foam pad polishing glaze- This removes the swirls left by the cutter and cleans the panels.
Then follow with a normal hand polish.
There is another 3m product that is good for removing 'hologram' marks that is sometimes noticable on dark coloured cars.
Can't remember the name of it off the top of my head but if you take your time and buff your car properly you wont need to use it !
Hope this helps
Rich