Check out this wild thermochromic (heat sensitive color changing) paint job demonstration by DipYourCar. Thermochromic inks or dyes are temperature sensitive compounds, developed in the 1970s, that temporarily change color with exposure to heat. [source]

I’ve fast forwarded the video so it starts at the big reveal. However, if you watch from the beginning you can see how the process is done to achieve this mesmerizing effect.