The pink and white buildings are card surface coated with shellac first. Then when dry I laid the wall face up.
I then painted them with 1) Pink chalk effect pink paint then while wet sprinkled with chinchilla dust, (sieved through a nylon pop sock-not mine!)most stays on the paint and
is left to dry overnight. When dry shake off stand building upright and any dust that has not stuck will obviously drop off.
You can go over any "bald" area by sprinkling sieved chinchilla dust on the patches and paint over the dust with the pink paint.
I was worried that the effect might be ruined by doing this but it works.
The cream/white is Sandtex paint applied as above.
Gordon Gravett uses chinchilla dust for ground surfaces but I found it very effective for buildings
Hope this helps-anything else you need to know please ask.
I believe the effect is pebble dashing
Thanks for kind words