As I've mentioned before I prefer painting things that are simple block colours, although I am now happy with my approach to painting weathered wood. Painting figures to look realistic is something I'm still not entirely happy with though.
Over the years I've actually painted quite a lot of figures, but these have been the slightly larger Warhammer miniatures from Games Workshop and I focused on painting Orcs and Goblins. While I learnt a number of useful techniques they don't necessarily help with painting human figures. Fortunately there are a myriad of tutorials on the web which I've now read through to come up with an approach that is fairly easy and seems to work reasonably well.
For this specific model I went with a blue overalls effect and used Model Color acrylics throughout, except for his shoes which were painted with RailMatch weathered black (#2412). I started by painting the whole figure black (#70.950) I then painted the overalls with flat blue (#70.962), the shirt ivory (#70.918) and the exposed skin was painted with dark flesh (#70.927). I then made a thin wash of burnt umber (#70.941) and ran this over the entire model to help add shadows. I then tried lightly dry brushing with dark sand (#70.847), which is a creamy colour, to add some highlights but I felt this looked a bit unnatural so touched some bits back in with their original colours and then applied another wash of burnt umber. Once dry a light wafting of matt varnish sealed everything nicely.
As I said before the close up photo is very unflattering but when viewed from a sensible distance I think he looks quite good. Now I just have to paint a locomotive for him to drive around in.