If you’re doing some serious spray painting, it’s good to do it inside some sort of booth to contain the overspray. Spray painter and Make: Projects user Randy Hawkins had been using a box with a cookie sheet over a trash can to paint, but “it did not do well containing overspray,” he notes.
So when he bought a new dishwasher, he converted the old one into a nifty spray paint booth complete with lighting and a turntable. He didn’t install a ventilation system, since he exclusively uses nontoxic paint, but you could easily put one in if you’re using the toxic kind.
Check out the build page on Make: Projects!