Colour a 3D STL file of a heart for printing

I have a high quality STL file (50mb) of a heart which needs to be colour 3D printed for research purposes. A Zcorp 3d printer will be used. I understand (but can't be sure) that Photoshop CC can be used to colour 3D objects and can save in colour .obj file format. This project also requires good knowledge of heart anatomy as the different chambers and arteries and veins need to be coloured differently! You can only colour what you can see/identify. This project requires: 1 Import the STL into photoshop 2 Colour the 3d object inside and out. The default colour should be red. Valves (Aortic/mitral): yellow. Coronary arteries and aorta: Deep red. Atria: different shade to ventricle. Coronary sinus, SVC and Pulmonary artery blue or altered shade. A colour scheme like this would be best: [login to view URL]:[login to view URL] this might be ok: [login to view URL] If using Photoshop please use the Zcorp colour settings 3 Save the file as a colour .obj file suitable for printing. -I will likely split the stl into two halves along the left ventricle for printing. If you are able to do that, that would be great but not essential. -You should have experience in medical illustration or knowledge of heart anatomy, photoshop (if thats the colouring tool you use). 3D design/printing experience would be great. Bonus for exceptional work available.