I actually made a black and white coloring tutorial for Color Me Copic too, scroll down or click HERE to see it and to take part in CMC's very first challenge which TGF has sponsored. The winner will get this new Oliver and Amelia "Journey" set!!
You can use any color of grays that you like, I tend to use the "C's" but neutral and warm grays will work just fine. For this image I'm using C1, C3, C5, C7, C9 and 0 (Colorless blender). Ignore the 110, I didn't end up using it :0)
Last step and finished image!
Used the finished image on this card so you can see how it looks :0)
Image by The Greeting Farm (Oliver and Amelia "Journey" set)