Came across this chap on youtube and have been pleasantly amazed at the amount of tips and techniques he has on his channel. Worth a look if you are starting out with an airbrush or are interested in how to get the best from various paint brands.
Barbatos Rex
https://www.youtube.com/channel/UC_66OBQNO8jXkHjlxnnxT-A (https://www.youtube.com/channel/UC_66OBQNO8jXkHjlxnnxT-A)