Wicked, Auto Air, Createx all work just fine... Key is you have to put down a base coat first. Some use transparent base, some use opaque white. Heat set your base, then add your colors to your design.
Personally, I use a hair dryer or heat gun while I'm spraying my colors to get them to set up faster and stay closer to the surface of the cloth. Seems to go quicker that way and use less paint. Otherwise it keeps soaking deep into the shirt and takes more coats.
