touch up spray gun?

Dear All:

Does any one know what touch up spray gun is? What's their difference with a normal spray gun?

Also, what's the difference between air brush and spray gun? which one is better for painting a car? What's the normal air pressure for using those?

Thanks very much. I am looking forward to painting my car. Still preparing ...

A touch up gun is just smaller. Holds less paint, has a smaller nozzle size and spray pattern etc.

An air brush is the next step down, used for very fine detail work only. It's more of an artists tool. They are very popular with people painting models etc.