I use several different brands of paints; however, Life Color paints are the ones I use most. It took a bit of practice to learn how to airbrush them correctly. Following is a short tutorial on how to get the best results out of this paint while airbrushing.
The paint works better stirred rather then shaken. I have found that shaking the paint tends to leave a lot of tiny air bubbles which can effect how it sprays. I normally stir the paint in it's bottle with a coffee stir stick. I am a bit anal retentive about ratios so I use throw away droppers, bought in bulk from medical supply websites, to measure both paint and thinner. By the way for thinners, I have labeled a dropper for each type of thinner I use, which cuts down on wastage of droppers. The ratio of paint to thinner should be between 60:40 to 65:35 for best results. Thinner then that and the paint tends to run; thicker then the prior ratios leads to a bit of a grainy finish. Finally, I always add 2-4 drops of retarder to the mix which really cuts down on nozzle clogging when the psi is correct (see below).
I have found that the best thinner for Life Color paints is their own brand, though Tamiya's acrylic thinners works also. Though the paint can be thinned with distilled water, I have found that the surface tension is a bit high leading to beading and spidering problems. Also, this paint goes down and adhears best to a primed surface. I have never had lifting problems provided the surface has been properly cleaned before priming, primed - I use Tamiya's light grey primer - and the paint has been allowed to cure 24-48 hours before masking. You can mask before that time and will most likely not have any problems, but I like to be certain the paint is well cured to avoid nasty surprises. By the way, all acrylic model paints have a curing requirement, it is limited to Life Color paints.
This paint likes to be sprayed at between 15-20 psi. Keeping that pressure allows you to control the coverage and the paint lays down very nicely. Also I don't get much nozzle clogging at that pressure. I get the best results by building up light layers of paint in successive coats. Depending on the color of paint being sprayed and the surface color it takes 3-6 coats to get good coverage.
Thats about it. As with all things airbrush related, practice makes perfect.
Ernest