Day 4. Weathering.
Here is a better representation of the colours as they come together.
I also used a tiny amount of MIG Gulf war sand in the recesses which was then fixed in place with white spirits (by flooding the surfaces with a paint brush and being careful not to disturb the powder).
Another 3 hours.
I will be finishing the sand and weathering the centre next, as well as starting the fugging Tarantulas :(