Then the model was chipped and muddied with pastels, pigments and acrylic flow enhancer along with some matting agent.
See the front glacis plate receiving some chips? This was later dust over with sand water based colours.
The overall model that has been dusted. Careful not to over do it as when its wet, it may not appear as light as when it is dry! Click on photo to see that the mud stains are still there underneath the sand dusting on the side fender armour system.
Overall, Dusted and chipped
