Hammerite's new Metalmaster system speeds up the whole process of painting metal stuff by spraying all sides of an object at the same time. You just clip the gun to the object with a wire, and electrostatic charging means that the thing you're painting actually attracts the paint particles. This means no brush marks, as well as an even, all-over coat. It only works for metal things, and you need to use specially formulated paint, but it sounds so cool that I want to try it out, and I don't even have anything to paint! Available soon in the UK, for around $80 for the gun and $30 for a 750ml paint tin. [Hammerite, T3 —thanks, Jez.]
it is like powdercoating, in that the material is attracted to the object by electrostatic charge, but you don't have to bake it to complete the process.
carmakers have been painting this way for years, that's why it is really hard to match a metalflake finish, for the charge makes the flakes "stand up"
the early-mid 80's gm cars were a nightmare to try to do spot repairs on because of this