Paints I get from toy world or hobby shops. Brushes from art shops like riot art etc. Airbrush stuff I suppose online or auto accessory places. There's a few threads on Airbrush and compressor equipment on here. Most of your touch up would be airbrushed using frisket or the like to mask off the area and then hand paint the lighter blue dots. I think that's how I would take it, but I'm still a major novice at this.