1) Speed up priming and base coating. The airbrush can be used for a lot of different effects and is super effective if you’re painting armies or larger scale models. 

2) Spraying indoors.

3) More environmentally friendly.In contrast to aerosol spray can primer airbrush is more environmentally friendly, safer (due to less harmful vapors), and you don’t need to dispose of empty aerosol cans.

4) Smooth Paint Coats. Similar to priming, airbrushing paint provides you with a great way to apply thin and smooth coats of acrylic paint on your models.

By applying low-pressure, low viscosity paint through your airbrush, you can create buttery smooth surfaces and finishes. It’s almost like cheating!

5) Paint Blending. Blending different colors or values across large surfaces is difficult if you’re using a regular brush.

With an airbrush, the paint layers are sprayed in thin layers. Each applied layers is semi-transparent because they are so thin.

This provides you with an easy way perform the “layering and glazing’ technique to blend paint.