Any method to remove rust stains from paving slabs

13 Jun 2005
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United Kingdom
During the summer I fed some of my plants in pots 'sulphate of iron'.

Now I have moved all my pots to a sheltered position for the winter.

I have patches of rust from the sulphate, is there a way of removing the stains.
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we had some rust stains in our marshall slabs - many years of rusty garden furniture, it looked a bit of a mess. Tried quite a few things (inc the vinegar) and couldn't shift it, 3 or 4 years on and it has now gone, I think it just faded away.
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Oxalic acid clears rust stains, and is not too agressive with the concrete of the slabs, but dont leave it on forever, brush it onto the worst bits slowly and wash away when done.

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