Hi Can anyone recommend methods or products to clean and

10/15/2020 - 03:37

Hi Can anyone recommend methods or products to clean and brighten limestone windowsills?  In my two photos you can see the dark staining next to the gold window frame and also the effect caused by part being behind the wooden shutters/part exposed to the elements.

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Apparently, a mixture of flour and hydrogen peroxide,  applied as a paste and allowed to dry does work - but never tried it myself

Thanks Alan.  That's not something I've ever used before but sounds interesting. We're replacing the old windows and so wanted to have a go at cleaning the windowsills first.