Well either way, it's easy. I can shade with black and white and get the same exact product as shading with colors (I shade with the colors I am using, I made a bunch of palets one day so yeah, have those to use). For shading with Black and white, all you do is change curves, level, and hue/saturation. Easy to do it that way too

Now stop going off topic with this talk on Monochromatic Scale Shading etc.