I really like airbrushing, but with a real aibrush, not a computer. It is harder to control, and much harder to fix any mistakes.
You do indeed work in layers, and sometimes many of them. It\'s really annoying when you make a mistake on a highlight and ruin the entire thing, also proper masking is essential.
Using a PC is a cheating way if you ask me. Too easy to fix problems, I couldn\'t airbrush like that on PC though, I am far better with the real thing, so I can\'t really criticise.
As for the real art comment, that will open an annoying debate. I assume you\'ve seen the Campbells soup can? I don\'t call that real art, but apparently it is. If an artist says it\'s art, agree... It\'ll save you a headache.