First airbrush was a harbor freight special, $10. or so, hardly even “toy” quality. All I used it for was spraying a cupric solution on hot metal for building a patina, for which it was functional.
I did a ghost flame job on my '66 mustang with a real airbrush I got at a hobby store, around $70. World of difference in performance.
There is a bit of a “touch” you will develop as you familiarize yourself with the tool, between PSI, nozzle size and viscosity - there is a lot of adjustability.
A fingertip push button controls airflow depending on how far you depress it, and the stem of that button pulls back to control how far the nozzle opens controlling paint flow
A good investment for a creative space.
That Steel dragon I did was done with the good airbrush, and is an example of a large project. Most are small items.
The ‘touch’ I describe is something that comes with experience, I have seen street artists using full size spray cans do stuff that I would struggle to produce with an airbrush.