I saw one of our Friends on PPCF color an image in greyscale a few months back.
Needless to say, I fell so in love with this artist.
Here are her links
Exclusive artist-Emily Luella
Instead of printing her in greyscale, I no lines her by reducing the saturation in Word.
that allowed me the capabilities to color over her to create a painted piece.
I used PolyChromos by Faber Castell