Find a good steel road frame you like and take it to a sandblaster. They'll remove the paint for you and you wont have to worry with all the messy, harmful, and potentially hazardous chemicals that go into stripping paint off a frame. Some could offer a clear powdercoat on the premises or else you'll have to act quickly as pointed out earlier; the raw metal will oxidize. Even finger prints could affect the quality of the finished raw look. Some people prefer the oxidized look though so YYMV depending on your tastes and preferences. Raw frame with a metallic clear coat might be pretty rad.