Is there any surefire method of cleaning cement streaks from the outside of upvc windows?? the streaks were caused by the recent heavy rain and i laid some timber over a newly installed bay but builder did not put on roof structure for 3 days and i got caught with the heavy rain, the wood i used had cement on it and the heavy rain diluted it so it ran down side of windows, left long streaks and has now hardened, builder is smug as he did not put up the pieces of wood. Its a fairly large bay window.
thanks
noah
thanks
noah