The result here is awful.
There are two types of airbrushing in my book.
i) The kind you know is airbrushed but looks good because it suits the house style. Just pick up a copy of Playboy and you'll see some great work.
ii) The type that enhances the image without being noticeable. It just enhances what nature already gave the model, or gets rid of that annoying pimple that the make-up artist couldn't quite conceal.
This tutorial doesn't really achieve either.