Ooooh, that's the really fun bit.
When you paint, even in a booth, there is a certain amount of crud that gets in to the paint. Plus there are the variations in the finish dry spots or orange peel. For a truly professional and spectacular finish, after the final coats are dry you then sand it back flat and smooth using very fine wet sanding paper. Sometimes I'll go right back to P1200 but usually P1500, then do it all over with P2000 and then P3000. This is why, especially with acrylic, you need to put on a couple of extra coats of clear - because you need that thickness to sand flat without going through. Then after P3000 you get out the buff and bring up the shine. Once with a cutting compound then again with a finishing compound and finally with a swirl remover or glaze.
This is how it should look, off the gun:
and then, after wet sanding and buffing: