Well I decided to start telling some of my customers about wfp today, preparing them for my future plans, promptly decided, not to as it was taking so much time, too many questions, so they'll get a leaflet when I'm ready.
One question that came up has been raised on here recently:
If purified water works so well, won't it draw the dirt from old bricks under windows/tiles under dormers etc? Leaving streaks? Especially when done repeatedly.
What is the answer, you Scientists/Artists?
Pj