Hi,
I have a smooth rendered and painted wall ( Dulux Weathershield) which is black stained.
I have a ionic residential pole which will reach all surfaces and wondered if any one has experience in this sort of cleaning. My window cleaner who uses his own poles does not want to know although I would have thought this would be a lucrative side line.
Any ideas on techniques/detergents etc. would be most welcome.
Reggie D.