<http://www.sciencedaily.com/videos/2008/0703-paint_that_can_prevent_plane_crashes.htm>Link
Chemists created a paint embedded with pressure-sensitive capsules
that contain a contrastingly colored dye. Violent scratches, dents,
or strikes cause the capsules to burst. Visual inspections for
changes in the color of the paint allow inspectors to pinpoint
potentially damaged areas.
