I haven't tried it because, functional prints, but... I spent a decade painting cars and did a bit of custom graphics work. I never got the chance to use color change paint, but it was on my list of stuff I really wanted to play with. A company named Eclipse used to make two color change base coat colors. They sold blue to white and black to white. A painter then applies candies over the base coat to make a color or graphics. Old skool candies are basically dyes; they only get darker with every overlapping pass and never reach an opaque saturation like all other colors. This makes them hard to spray evenly bc any overlap in the spray will cause streaks. The thing I always wanted to mess with was tape out graphics, where I use a candy over a large graphic with all the different sections cut out so that I remove them in a certain order to make something like a gray scale graphic ghosted into the candy. The challenge is that the base coat will be cold/black while shooting making it impossible to see what you are doing while spraying. The results are only visible after the job is completed and the surface is in the sun. IMO this is the most interesting way to use a color change medium. You can do this with any type of semiopaque paint or dyes. It is why most transitions go to white. It is a blank canvas.