No such thing as a stupid question
I use my airbrush for as much painting as possible. The finish is better than brush painting and rattle cans seem to waste too much paint. The paint from cans can be decanted and sprayed through an airbrush. Use a straw to do this – don’t try to puncture an aerosol can unless you are a trained professional!
The only time I use spraycans straight from the can is for final and clearcoats. By using a can outside I find I pick up less dust on that all-important finish than I do with my airbrush in the garage.
Phil