A couple of close-up shot from the Broadway production of Cats.
Top - Munkustrap
Bottom - Skimbleshanks
Comparing the two makes for serious geekery, or technical interest, depending how you look at it! Munkus has some faint base work on the right-hand side, but is mostly about the hatching. This is done with a fine tipped bottle, applying a fine line of paint. You can see on the lower left how there is multiple layers built up.
Skimble, on the other hand, is at least three-four layers of sponged colour, softly overlaid to build up a rich texture. This has then been hatched over using a different method- while all Munkus’ lines are of varying weight, the lines themselves are solid, but Skimble’s lines show harder edges, and fainter in the centre. The colour also concentrates on the bottom of a lot of the strokes. This is more typical of a felt pen, where the felt nib carries the ink unevenly, and the darker concentration is where the pen has paused on the fabric.