Originally posted by: Wuffsunie
From my room mate, who does a lot of modeling:
An airbrush for a case mod depends entirely on the pattern you want to reproduce. Do you just want to spray your case pink overall? Then most large scale airbrushes like those you can pick up at walmart will work. For a metal case you?re probably looking for something that will spray laquer, so preferably something all or mostly metal, to make it easier to clean with the harsh cleaners needed for laquers.
But, and this is the big but, lets say you want to paint on a picture, or some of the other nifty effects some case modders do. That generally requires a much finer airbrush tip, sometimes even one that can do almost pencil-thin lines. For that you need an artist or modelers airbrush. A company called Badger makes a whole line, from simple single-action ones that spray a decently thick line, to artists dual action internal-mix-airbrushes that can shade and do whatever you toss at them. The badger 175 crescendo may be a good choice if you want to do something like that, as it usually comes with fine, medium and large tips to cover any size are you want. Also, being all metal, its easy to clean. I vouch for them because I own two. Stay away from the plastic-bodied ones though, they tend to degrade rapidly when using laquers.
Of course, if you want the ultimate precision, top-quality, l337 h@><0r airbrush then go for an Iwata, but be prepared to shell out 200 bucks on one. Of course, if you do, you can do calligraphy with it too. 😉
Another thing to consider is where you?re getting your air from. Do you have a compressor? Or will you be using compressed air cans? The latter get used up phenomenally quickly, while the former can cost quite a bit. You can, though, get a decent compressor from walmart for 99 bucks that will run a single airbrush easily. It all depends on how far you want to go.