I recently tried a shading experiment using a tight 3 bugpin liner (works the same in my oppinion as a single just a bit more reliable... thought that maybe just in my head...hahaha....anyhow....) And here was the results....
NOTE: Forgive me if this picture is too big, as I am not terribly certain about file sizes for pics in forums and whatnot....
It was the little fuzzy ball I shaded entirely with the BP Liner using short (obviously) repetitive whipping motions. Also, my machine was set up running as though I would have it for light smooth greywashes.
ADDITIONAL NOTE: This healed beautifully by the way.