I wouldn't say that I have done anything special or added anything to the process. My prep work still needs a fair amount of improvement, my painting is ok, and my wet sanding skills could be better as well. But as you said, once you get the paint on the car, with a little extra effort in polishing (and some high-end products and equipment certainly help) it is possible to achieve some really impressive results.

And the best part with the polishing is that every time the car gets a re-polish, the paint will get a little bit flatter and look that little bit better.