Spattering!

Spattering is great fun!
Its a technique used to add texture to buildings - or even snow to a dark night.

Firstly you must mask off the area that you don't want spatter to land on, as in the first pic

Then you load a brush up with a wash of your choice and flick!
Once you are satisfied with the result, remove the masks and voila! The result is revealed.( as image below)

The church now needs just one more layer of paint and the Tower will be finished.