If you are using Turtlewax to do your buffing then you will need to buff it pretty much for ever before you can get a decent shine out of it.

If you use a decent orbital polisher (like a PC7424) together with some decent cutting compound/swirl remover then you can achieve spectacular results pretty quickly.

The pic below is of my hardtop that I painted with Brightside Gloss Black, wet sanded and then did two passes with my orbital polisher using a cutting pad and Poorboy's SSR3 cutting compound.



There is no reason why you can't achieve similar results if you use 'proper' polishing equipment and a good cutting compound/swirl remover like the Poorboy's.