Color sanding a fresh paint job is fairly common practice now - especially when you want to bring the overall restoration into the highest categories of superb paint work. The procedure starts with 600 or 800 wet paper to knock down any dust nibs or rough that is really rough clear including orange peel and dry spots. Once that is carefully knocked down you move up in increments and finer sand papers through 1000 grit than 1500 then 2000 and 3000. Often 1500 up is done with the DA sander.
Here it is after sanding with 600 grit wet paper. The white residue is the clear that is sanded off.
Looking closely, you can see the spots that are sanded down to flat. This is ready for sanding with 1500 and 2000.