Just an FYI, as you seem to have given up the rollering. I waited 30 days before final sanding.
My final sand was 2000 wet - any good auto parts or auto paint store will have that. I am lucky I guess as a friend has a Festool Rotax polisher - $800 here in Australia. Cut it twice with that and then polished.
I am using Brightside BTW gloss black.
Best way I could describe the finish is black chrome. Awesome. Incredibly smooth. My only issue is I have some marks in one of the layers of the paint - trying to figure that problem out now.
Cheers,
Frank.