Just make sure when you're done sanding with the 2000 you cant see any scratches from the 600/1000. The 1k/2k jump must have taken forever to do. If you've don a good job sanding all the way to 2000, buffing won't be that bad. Just sux when you're done and you see a couple of those 600 scratches you missed. If you haven't buffed a lot before maybe a wool pad would be easier for you (less apt to burn fresh paint).

FWI the Nason clears wet sands VERY easy but air dries SOFT. Be careful with the buffer.
..good luck