My van needed paint but re-paint quotes were high $$$. Its twenty years old so I thought what the heck, try the $50 paint job that is rumored to be Internet lore.
So far I am impressed with the ease with which I prep the old paint by progressive sanding, mix the paint with thinner, roll on the paint and control any runs or bubbles by using the roller. Also, the small foam brushes help get into crevices.
This is just an overview of the process. There are a ton of instructions on the Net that you can follow and get the job done.