Hi All,
Got the sand done and this is how I got it to look the way you see it in the last picture.
Pic 1 - I mix fine sand with spakfilla, PVA/Woodglue, Brown Dye and a little water, I mix it all together until I get a pancake type consistency and then I startto add it to the base.
Pic 2 - Once the mix has dried I then give the base two to three washes of Vallejo Light Brown.
Pic 3 - Once the Light Brown washes of dried I then give the base two to three washes of Vallejo Desert Yellow.
Pic 4 - Once the Desert Yellow washes have dried I then give the base two washes of Vallejo Dark Sand.
Pic 5 - Once the Dark Sand washes have dried I then give the base two washes of Vallejo Pale Sand to end up with the final look.
Ron