So you do not have an air compressor? Might be a good idea to get one. A small detail gun (or airbrush) takes very litttle air so you only need a small compressor that you can use for many other things. I use an small old Devilbiss MP gun for sunbursts, it does not need a lot of air. Regardless of what you use, be careful with the air pressure. Do not go too low: -your atomisation will suffer. Sunburst is a little sensitive, you need really fine spray particles. You can go slow with many passes, that is what I do when I replicate 50´s and 60´s Fender and Gibson sunbursts and need a lot of control.