I am a newcomer to the airbrush community and I'm failing at the basics. I purchased the Central Pneumatics airbrush compressor and kit. The kit comes with incomplete instructions regarding the miture of the paint stating only to "use the proper mixture". Long story short...I've ruined two air brushes and have yet to spray anything but water through the third airbrush. Can you guide me to any specific instructions on proper mthods for mixing paint and other basic instruction?