Here is the method I use for quickly paintng troops . Carefully remove all mould lines . Then wash the figures in warm water and washing up liquid .Then leave to air dry (someone gave me this tip and it seems to allow better grip for the paint , dont ask me why ). Do not touch the figures . Spray the figures with a white undercoat I use games workshop skull white . paint each colour diluted with water the ammount depends on the colour and the type of paint this adds a very good shading effect . Then wash each figure with games workshop devlan mud or from the new range agrax earthshade . Alternatively use windsor and newton peat brown ink for a cheaper alternative . This will leave a slightly gloss finish which some people like . If like me you dont then a quick spray with army painter anti shine matt varnish will do the trick and add a bit of protection to your figures .