Just came across this. looks quite interesting.
[video=youtube;YfUAY41F5KE]http://www.youtube.com/watch?v=YfUAY41F5KE[/video]
The crystals in the paint are orange when above 26 degrees C, and go clear below.
[video=youtube;YfUAY41F5KE]http://www.youtube.com/watch?v=YfUAY41F5KE[/video]
The crystals in the paint are orange when above 26 degrees C, and go clear below.