How to remove rust staining from Kandla Grey Paving

My Kandla Grey Patio has discoloured, can it be restored?

Kandla Grey sandstone paving is currently very popular due to its contemporary grey tones. Presently grey is a frequently chosen theme in all areas of home design.

After a period of time Kandla Grey paving can discolour, showing yellow to orange staining on the surface which is difficult to remove.  These stains are caused by iron deposits which occur naturally within the stone.  Over time these deposits leach from within the stone. They  become present on the surface, potentially ruining the overall appearance of the stone landscaping area where they are present.

The process of leaching is helped by our (usually) damp climate.  Although this process is a totally natural occurrence, it is undesirable to most people, who select Kandla Grey for its pale grey colour.

What can be done about the discolouration of my Kandla Grey Patio?

Firstly, we advise you to reduce the problem by buying your Kandla Grey sandstone paving from a reputable stone merchant.  Here you will find that rather than select the cheapest material available from the quarries in India, care is taken to select a better quality stone. For instance, at Stoneworld we specify a particular seam in our favoured quarry in India for the selection of our Kandla Grey Sandstone Paving.  This ensures that we have a product that has less iron deposits embedded within it from the outset.

More iron deposits occur in cheaper grey sandstone

If you buy a cheaper product, it is possible that you will be purchasing material that we have rejected, and it will therefore have higher density of iron deposit embedded in it storing a problem for you later.  This will not be visible at the point of purchase, but the discolouration will occur at a faster rate than with a better quality sandstone purchase.

That said, discoloration may occur in any Kandla Grey sandstone to some degree.

How to remove rust staining from Kandla Grey sandstone

There is a product that can be used to remedy this situation, and the results are impressive.

Rob Parker’s Best Rust Remover has been found by us to be highly effective at removing rust staining from Kandla Grey Paving.

Recently, at Stoneworld we gave our display area a deep clean.













Before Cleaning with Rob Parker’s Best Rust Remover


After Cleaning with Rob Parker’s Best Rust Remover

This area was laid 14 years ago. You can see here the ‘before’ image of the Kandla Grey Paving is only showing slight discolouration. This is even after more than a decade of our damp weather conditions. (summer 2018 excepted!) This is due to the extra care we take when selecting the paving we sell.

You may experience far worse discolouration, but Rob Parker’s Best Rust Remover is capable of achieving  a very effective job at restoring your patio whatever the degree of rust staining.

The ‘after’ image shows how effective the treatment can be.

We suggest you use it on your stained Kandla Grey Paving to bring it back to its former glory.

Buy Rob Parkers Best Rust Remover now >>

2 thoughts on “How to remove rust staining from Kandla Grey Paving

  • 1st May 2021 at 8:00 am

    Hello. I have just had a new pale grey colour patio laid and I have noticed that two of the slates have changed colour with a beige stain on them. Can you advise me on what this would be and how to remove it. Any advice would be appreciated.

    Thanking you.

    • 11th May 2021 at 12:16 pm

      Hi Alison, thank you for your enquiry. We have a wide range of stone care products suited for natural stone but we would recommend using our Rob Parkers Best Rust Remover with this problem. You can find the product, and more information on how to apply it on our website:


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