I have recently had my ho****er cylinder emptied to change new valve
and the resultant muck and water from the cylinder have left a dirt brownish tinged stain on the side of my house under the overflow. Th wall has been finished with snocrete and white harling (roughcast) can anybody advise me as how best to get rid of this mess - it is ver noticeable and looks terrible. What's the best way to clean it of please??
Thanks very much :-
-- BigStrongGal