Martin, I took an old paint brush about a #3 cut off to about an 1/8 of an inch.
roughed up the short bristles, and using payne's gray.
I dipped the brush in the paint then wiped off most of the paint and gently dabbed the brush in the 5 o:clock area.
Did this until I got what I wanted. Kind of like dry brushing, except I dabbed.