Red spray paint in slow motion! The fins of the rocket are getting painted, and then watch the movie to see the solvent flashing out of the paint. Actually, this movie really shows why professional painters recommend starting the paint spray off the work piece, then moving on, and then past, and the turning off. The reason is, you can see when my arm stops to move the other way, too much paint is applied at the "stop" spot. Much better to have many light, consistent coats, than blotches and runs. That's the long way of saying, look at my crummy technique.