I finish off the background behind Superboy with brush and a lighter line weight. The foreground, at his feet, is finished with a heavier line weight and more blacks.
The final step is to come back with white and pop out a few more things. For instance, the gleam in his eye and the shine on his armor are done with some clean white feather lines mixed slightly with dry brush whites to soften it up.
I finish off the whole thing by throwing down some white cracks and dings in his suit, Wonder Woman's head piece, Green Lantern's lantern, etc...
DONE - Whew, now I need a nap!
NOTE: Make sure you have someone standing by to yank the piece away because there's ALWAYS a little more tweaking you can do, especially on Jim.