The classic pain types, with a base, wash and layers.
Dark brown horse
General dark skin.
Aged Bronze for example.
Useful for all sorts of animal beaks etc.
Vials of bubbling liquid. Key is to make sure the level of the liquid is horizontal!
Useful for worn metal as well.
Terminator Armors, e.g. for SpaceHulk.
How to do white over a black undercoat.