One thing I like about this board is that there are always alot of differing opinions to choose from. I like to use the finer papers to get it as smooth as possible (within reason) before buffing. The finer the buffing compound, the less chance of cutting thru the clear on the body lines. There are wet sanding disks available for use with a DA up to 2500 that go on regular DA pads. There are also 3000 disks available that require the use of a special pad. Using them takes very little effort, and will almost make it shine, before buffing. Then I use either "Perfect-it" or "Finess-it" from 3M for the buffing, using foam pads, and have had great results without swirl marks. Others have their favorite brands of compounds, and reasons using for them.