Matt,
Everyone's knows an unshaven type is unsavoury and more than likely a fifth columnists.I mean it stands to reason.
For this style of painting all the figures are undercoated with a pale grey aerosol. Then it's just super fast as I jut paint the top half of the face leaving the jaw line/stubble as under coat.Then its a dark grey thinned with a purple ink . Lightly applied on a couple of coats.With a final light dry brush of the base or mid tone of the flesh colours used. It's. Very quick a couple of minutes for all of them.
The clothing is done in a similar way allowing the undercoat to act as a part high light. Buy wiping a little bit of paint off as it starts to dry.
The denim on the sailor is where its most obvious (although the suits are done exactly the same way.) single colour of blue wiped off in highlight areas then the dark grey used for the stubble is used for shadows (any over paint quickly. Wiped off to keep the grey in the creases.Then a very light dry brush over selected areas of a sand colour
And few more pulp bits to start to bring my pulp stuff upto date.