We have been having a lively discussion over on the Studebaker newsgroup about a really cheap method of painting a car someone has come up with.
It involves using a product called "Tremclad", apparently a Canadian version of Rustolioum, you thin it until it's a big thicker than water, and then BRUSH it on the car (truck, Jeep) with a foam brush and 4" foam rollers.
Obviously you don't want to do this on a show car but to make one look presentable it might be worth a shot.
Jeff DeWitt