These are usually less expensive portable compressors and nailer compressors. Remember you can always chain compressors together to get more CFM. One of the benefits of this size compressor is portability.
Option 1: Mini Guns
Option 2: Full Sized Guns
You can always use a Mini Spray Gun. Some of the newest mini guns can get up to a 7" fan which is pretty impresive for such a small tool. Mini Guns generally take about 4CFM but you can get by with 3CFM@40.
NEW! PRESSURE FEED MINIS AVAILABLE
3CFM@40 is a little too small for a full sized spray gun. You could do burst spraying and very tiny pieces but we generally suggest you use a mini gun or add a 2nd compressor.
4CFM@40 This is borderline for the full sized guns listed below. While you can get by we recommend that you add a 2nd compressor.