Some interesting questions here.... The possible significance of the colour blue (as a defence against energy directed weapons?), and at the end, some clips of melted aluminum from cars - in a grass fire! 18 minutes long.
I doubt it's "energy weapons" in general. If it was indeed a
LASER that was used (not a MASER, XASER, or anything like that), then it would make sense if blue colored materials weren't being damaged by a
blue wavelength laser. Blue materials reflect the blue light spectrum while other materials absorb it, thus no damage should be dealt.
If the laser would have a different wavelength then a different color should be resistant to it, so if one was to paint everything blue expecting to be protected against all lasers, they would get unpleasantly surprised if a red laser was used instead.
Probably the only thing effective against all kinds of lasers would be... a mirror, because it reflects majority of visible light.
But i have no laser to test it to be sure. Maybe someone on the forum has access to a lab with a laser in it, and they would be able to try out how a laser fares against materials of same color, or is blue really special in that regard.