I used a 2000 Grit wetsand paper after applying 2 coats of clear. After that you just have to polish the hell out of it in order to get it to look glassy and full of gloss. I didn't have a buffer since I'm scared of burning the paint off, so I did it by hand with an applicator pad.
Best compound to use is Meguire's Ultimate Compound!
here's the final result of mine:
