You can use fingernail polish with an airbrush too - this is one of my all-time favs. The colors and effects you can get with nail polish is amazing.... sparkles, glitters, pearls, etc., any far out color imaginable.
And you can get them on sale for cheap too, my last batch I got 3 for a dollar and it doesn't take much to do an enclosure.
My wife will buy them too, and try 'em and not like them, so I score those too.
Hey, it's paint.... and I don't even get embarrassed handing it to the cashier anymore
do you have to thin the polish at all? it seems kind of thick.
Yes, you will need to thin the polish to shoot it through an airbrush. There are a couple of ways to do this...
First, you can use a 50/50 or so mixture with lacquer thinner - experiment to find the right ratio for the brand of polish you are using. The one bad thing about using lacquer thinner though, is that it can possibly react with your primer or base coat (acrylic or enamel) and cause cracking/grazing while drying, which is normally undesirable.
I prefer to use a 50/50 or so mix of acetone & nail polish (again experiment to find the right proportions). Acetone does not react adversely with primers & base coats, & will not cause any cracking that I am aware of. You can then use straight acetone to clean your airbrush when you are through.
This stuff drys fast, so shoot any extra coats soon, before it starts to set up and harden.
Try different base coat colors, white, black etc., and you will extend your range even more.
It's also a good idea to buy several of the same color at the same time (same manufactured batch) to match the color if you run out halfway through a shoot.
A good clearcoat afterwards really helps bring the finish to life too.
And of course, prep work is the key to getting a durable, smooth finish. Spending a bit more time in the beginning getting the enclosure ready will pay off big time.