Mix 2 parts distilled water, 1 part Windex and 1 part Simple Green cleaner.
This will clean all acrylics very well.
For cleaning, I like to wipe out the excess paint from the color cup and then spray cleaner through the airbrush untill you feel it is pretty well cleaned.
Then I spray water through it to remove the cleaner residue.
With the Omni 4000 I put the above mentioned cleaner into the color cup and then take a small paint brush such as a # 5 or so and wipe it around inside the cup to break down the paint in the bottom and sides of the color cup. I then follow what I wrote above about spraying cleaner through it and then water. That is about all you need to do. About every third painting session I would break the airbrush down and clean it more thoroughly by wiping the needle off with cleaner, and cleaning the inside of the nozzle of any paint that may have dried in it.
Some people break it down every painting session but I feel that is unnecessary if you clean it good each time.
I would also recommend getting some Badger Needle Juice for the needle to help protect it from dried paint and to smooth the action of the airbrush.
Mike
“Wisdom is the right use of knowledge. To know is not
to be wise. Many men know a great deal, and are all the greater fools
for it. There is no fool so great a fool as a knowing fool. But to know
how to use knowledge is to have wisdom. " Charles Spurgeon