I always liked to blend - I used estompen, Q-Tips or my fingers. But Since I worked with the book "Drawing for Dummies" I like much more the way Kim does the shading. Or with different grades of graphit.
And the way Paulette does it, lookes very good to me - it needs a lot of patience. And patience is a scarce good for me.

(Did I said it correct?)
But I am working on this........