Okay, so I have been working and practicing further with the Chimera. Having sponged Charadon Granite onto the model (concentrating on open corners and moving areas), and given the model an overall wash, I had to go back over and highlight the paint chip effect. This gives the impression of depth... as if the paint literally has chipped and flaked away leaving the base colour or metal showing a few milimetres behind it. Of course, highlighting every chip and scratch would be too laborious, so I concentrating in certain areas and made sure to highlight the lower edge (because light comes from above!) See what you think.