The first step was to paint the whole base in 'Double Espresso'. Now the weird bit - I actually painted the tree trunks too. Firstly, one had split exposing the screw and secondly, the actual twig didn't look natural enough in 28mm scale!Next, I drybrushed the model with 'chocolate' (quite appropriate considering the day!)
A note on drybrushing - I am a great believer that less is more when drybrushing - it is much better to reload your brush several times and gradually build up the coats. Firstly I use kitchen towel to scrape off the excess paint and then brush off more on a separate piece of towel. Then, I 'Dry brush the back of my hand until I cannot feel any moisture, only then do I introduce the brush to the model. This process is repeated until the require shade is achieved.
After only minimal drying time (enough time to remove the seal and lid from the next pot) I drybrushed the whole model again using 'pebbles'. I didn't clean the brush from the last stage, which helps the shades of brown graduate more.