Japanese garage kits are usually cast as separate parts which are packed with instructions and sometimes photographs of the final product. Most professionally manufactured kits come in a box while amateur-produced kits sold at conventions come in plastic bags, blank boxes or even boxes with copied sheet information glued onto them. They are not painted, but some of them do have decals provided by the sculptor or circle. The builder then paints and assembles the model, ideally using an airbrush. However, they can also be painted with a regular brush using a variety of techniques to achieve similar effects as when painting with a conventional airbrush.