Everyone has a different opinion on buffing and it depends on a lot of things like, how much clear,what type of products, what type of buffer ect.
But fast and easy, is DA with 2000, then 3000,(hand wet sand curves and body lines) buff with 3M Perfect-it 3 with wool pad. Then foam pad with 3M Foam Pad Polish.
You can denib with a denib file or stone for the really big stuff first. Then go to the above.
Now I'm sure others will have a different system and all may work well, it's like I said depends.
Dave