This is a tutorial about painting black without just drybrushing dark grey over a black base coat (which is what I usually do) and trying to create a range of 'blacks' on a potentially monotone model like a Commissar - it also brings out my aversion to just painting Commissars black (I don't know what it is but even Yarrick I painted very dark brown rather than black).
Stage One: Basecoat the model - use colours that you think will make good highlights (the base coat will make the highlights up)
Coat: Khemri Brown (Dark Brown Coat)
Belt: Calthan Brown
Jacket, Cuffs and Hat: Fenris Grey (to give a dark cloth black)
Trousers: Adeptus Battlegrey (to give a matt
Boots: Necron Abyss (to give a dark polished black)
Skin: Tallarn Flesh
Stage Two: Wash (GW Washes used)
Coat and Belt: Devlan Mud
Jacket, Cuffs and Hat: Badab Black
Trousers and Boots: Badab Black
Skin: Ogryn Flesh
Stage Three: Wash (Badab Black layers - all except face - until desired effect achieved) The basecoats shine through as highlights.
Stage Four: Add Highlights to the model (Job Done)
Black but not black finished (Ignore the dodgy eyes they have since been fixed!)
EDIT: Final Model with dodgy eyes fixed (at least partly) and a matt varnish - which has come out a little 'dusty'
Quick Glossary of the Basics: Undercoat: The first layer of paint on your model - usually white of black primer spray (I almost always use black as a preference)
Basecoat: The first layer of colour of your model - the basic colour of any part of your model (for the beginner - GW foundation paints are a winner)
Wash: A watered down paint used to provide shading and definition to the model (usually in a complementary colour to the basecoat e.g. Mid Brown basecoat, washed with a Dark Brown wash to shade the recesses on the model). You can either use bought washes (which I tend to because I am lazy) or you can create your own by simply thinning normal paint with water. Note: Glazing is a similar but more controlled use of washes, often used to enhance colour or in lighting techniques
Highlights: Painting the areas of the model where the light would catch e.g. the edge of a sword, with a lighter shade (usually linked to the basecoat). Can be done with sharp highlights (good for armour and metal - easiest to do - this is what I have done on the Commissar) or developed into layering and blending (expert level techniques worth several pages on their own)
Cheers Laney - feedback appreciated