I could draw a bit, enough to entertain my kids anyway, but apart from that have no background in art whatsoever. So I think anyone can airbrush, however having that underpinning knowledge makes life easier. But it's not essential. Sometimes guys here go all technical and start going into colour theory etc, etc, and it's way over my head. But I manage to paint stuff that makes me happy, even if the quality isn't as great as some. Trial and error, experimentation, instinct, and pure luck eventually stick in the brain, it just takes a bit longer.
But can you just pick up an airbrush and go without any previous art experience? It's possible, with natural talent (oh how jealous I get LOL LOL LOL), and an instinctive understanding of how to control an airbrush, and manage paint/air ratios etc, etc, does happen. But I would say that usually most people, need to learn how to use the airbrush, get consistant smooth paint flow, and learn the basic strokes and blends first. (which I didn't do and made life much harder for myself, and had to unlearn lots of bad habits, and made the whole process twice as long, Doh!) Then have a basic understanding of light source, shadows and perspective. I muddled through on my own, learning from my many, many, oh so many, mistakes, and started to progress - determination, and willingness to put in some time is just as important as anything else I think. Then I grew a brain and looked online, and started to come on in leaps and bounds, especially with this awesome bunch in support!
With all the help and advice here, anyone can learn to airbrush, but usually it just takes time. I've been ABing now for close to 3 years, and still have a long way to go, but people are different, and some could get to where I am in weeks.
Learning to airbrush, and being an "artist" however, are not the same thing, not to me anyway. Being able to produce something original, and come up with your own ideas and designs, and develop your own style, is what make an artist, something I am trying, not very successfully, to do :witless:. But whether you are a natural, or just plain bull headed like me, you can do it.