Original post by: Alina ,
Hey @balazs, thanks for reaching out about this. It would be best to create a multi body STL, where each body represents a different colour. When you import this STL into Canvas (our slicer), you can simply drag and drop each colour onto each body, rather than manually painting the model. When your model is ready, you can try it out on [http://canvas3d.io|Canvas], which is free to use.