The ability to do fine lines really is control by the skill of the person using the airbrush
If you can't get a fine line with a VL a Micron won't do you much good
Just so you know...................
0.35-mm needle and nozzle is fine if you have the basic's down solid
0.2-mm nozzle is generally thought of as a good size for fine detail
Just asking here.. but that tip on using a 16 guage of stranded wire, unraveling it, and then using that to spray on for fine hair lines, could that not work? Or is the OP referring to individual strands level of detail?