trynda1701 - Sorry I missed your question, from clear back last year.
Here is a link to the cheap airbrush:
http://www.amazon.com/Testors-4030-Amaz ... rush+paint
(it used to be an Aztec-branded thing. Testors bought the rights at some point)
$25 USD and you're off and airbrushing.
This is not a fancy airbrush with adjustable feed and air volume.
This is a simple, plastic thing, with a on/off trigger, fed from a can of "canned air" and small siphon bottles of paint.
Fundamentally, it just gives you the ability to mix your own colors and thinness of paint, and apply it as you would from a "rattle can". Being able to thin the paint down helps make it much better than overly-thick rattle can painting though and you can get nice, clean and even coats. For basic base color coats on minis, it is plenty good.
I've noticed these are even for sale at my local "Kroger" store ("Fred Meyer", in my case) and Micheal's Arts and Crafts.
Gary -
The only way to learn is by doing. Don't beat yourself up over a paint job that you aren't happy with.
If it's "good enough" for a game piece, don't waste energy worrying on it. If it's not "good enough", then strip the paint and start over, taking the lessons-learned forward.
I couldn't tell you how many minis I've "sent to the dip", for disappointments big and small.
There are no "rules" to what a paint job should look like. Everyone has different standards and needs.
I've gamed with people who left them bare-metal with a stripe of nail polish, some who dunked them in model kit paints, some who even slopped on a quick coat of housepaint. They were fleet/army-builders and viewed them as little more than markers for the game. Enough color to be able to tell them apart was all they felt was needed.
I came from a scale-model building background, so my personal fit, finish, and detailing standards are on the opposite end of that spectrum. I like my minis to be tiny scale models. I also know some of my fellow gamers would think I was crazy for spending so much time and effort, per ship.
To get to a Tony Thomas or Jim Lewis level of minis mastery is not something that happens with 4 or 5 figures, in 10 to 20 years. Guys at their skill level have done dozens, if not hundreds, and the experience from all that shows. I'm sure Tony would be the first to say that the first dozen or so that he did don't look anywhere near as nice as the most-recent dozen. I know it's certainly true in my case.