Thanks for all the comments and remarks much appreciated!
@White Knight, they were bought from Antenocitis
@Suber, glad that you find the buildings realistic especially as your spanish and know the look.
@Remington, you're right I will experiment with some other tones when building more of these
@Turbo-ben, the windows came from Warbases
@Mindenbrush, the sand storm method looks great, I have used it when I started using woodglue and fine white sand but the results weren't so great probably due to the choice of fine sand.
Cheers