Paint may not appeal to everyone, but using the sun's powerful wind of energy against an incoming asteroid plays a crucial role in several deflection strategies.
Take, for instance, sending a spacecraft to attach a giant solar sail to the surface of a near-Earth asteroid. This structure, once unfurled, would reflect solar radiation and gently push an asteroid away from its original destination. In some plans, the sail would even be adjustable to provide a certain degree of remote control. Many experts doubt about attaching anything to an asteroid, however, is a wise idea. After all, these rocks are tumbling and spinning and, while we've landed unmanned vessels on asteroids before, we've hardly set up anything as complex as a working solar sail there.