what does the tech sheet recommend for final sanding?

when I daily spray PPG DBC base coat I final sand with 400 dry, 600 P grade wet is about the same, apply sealer then clear.

when wet sanding what is the grit rated? there will be a P behind the numbers for P grade. P grade is usually black and is the most readily available now. A grade is usually gray with no letters behind the numbers. P grade has coarser grit and you should use 1 grit higher than A grade paper.

perception is 90% of reality