Soon metal may never require paint. Researchers are now testing high output laser abrasions that refract light to a controllable color. Black or blue gold, aluminum, even multi color. The article suggests one could have their family laser etched on to the hood of the car at the factory. Never requiring paint, polish, or maintenance.
This is good for our environment. While the power requirements are likely energy intensive, diminishing all those toxic paint chemicals would be nice. full story