That’s beautiful Mark!
I would love to see your art 3D printed with a bright, enameled, CMYK colour on the exterior surface.
What I think you are asking is possible, but there tricky part is (of course) the application of the colour to the exterior surface.
To make the concept work, the colour has to be applied as the 3D printed layers are applied as a surface pigment.
The only way that I have seen working well is printing using plaster instead of plastic. I think HP have a machine that prints plaster objects and then uses an inkjet-style system to squirt coloured dots as the object is created.
There are two drawbacks to that system:
Firstly, plaster is very fragile. If you are happy to be very careful with your finished piece, and protect it from any bumps or knocks, then maybe you will be happy with that.
Secondly, the pigments look fairly dilute, and the resulting colours look a little pastel me, rather than a bright, glossy enamel coating that I was dreaming about.
Here is an example:
Printing bright, glossy, enamel CMYK colour onto a 3D plastic object is harder, and there aren’t any examples of that I know of.
The problem is that plastic does not accept pigment very easily, unlike plaster which is water soluble, and allows the pigment to mix into the object’s surface and stay there.
Of course there is a great deal of interest in this concept, and when something does become available, we will all surely find out very quickly!