On a whim I bought some railway modellers’ pre painted OO scale civilians from ebay; they were very cheap and I’d seen someone use the O scale ones well on Lead Adventure forum. When I got them they were worse than I expected if I’m being trueful but decided to base up a few any way and see how they looked.
Firstly I textured some ply hex bases with homemade textured paint. I glued the figures on, gave them a heavy all over wash of Army Painter, drybrushed the base and then hit them with some matt varnish.
If you look at an individual stand you can tell how awful they are.
That said I think the mass effect works and they should be useful for some modern city based games. When the rest of the packet of a hundred are done it should make quite a crows.. The same ebay seller has civilians in arab dress so I may pick up a packet of those too.