as I said, I had brush painted for thirty years, from house paint to the finest oils and brushes and was familiar and fairly competent with techniques in three other liquid medium. But....
one day, i was sitting by the pond and absentmindedly reached for a cat tail reed to chew, i suppose. not really paying attention, i bit a tad too much mud from an end and needed to spit...quickly.
as i reached to push Doogie Bowzer, a light colored Chesapeake Bay Retriever, i spit mud on my hand and against the surprised dog. I had my first airbrush positive image, and was converted.
From a Master, I've learned to paint a line as fine as hair or blend a wash or fade as fine as needed. As someone once told me " Never under estimate the power of the airbrush"