Rust marks? - Stained indian sandstone

[Bar2009]

I have recently had a Indian sandstone patio laid in my front garden. I noticed after 2 months the appearance of "rust rings" dotted around the patio and certain slabs which have "yellowed" over the 4 months which it as been laid, and have tried conventional patio cleaners in conjunction with power washing which have lessened the marks but not removed them. This patio has never had metal garden furniture on and looks as though the stain permeates from below. I have also had a paving cleaning company out who could not give me any ideas as to why this has occurred. Today I have also tried your method regarding Lemon juice and white vinegar but to no avail. I do welcome any suggestions you might have or any contractors who would like to undertake the work!!. I am getting the contractor who laid the patio around tomorrow to investigate, but I am pre-empting him suggesting that it is nothing to do with his workmanship or materials used. I welcome any response, thanks

[higgness]

Put up some pictures, so people will get a better idea of what they are dealing with. Also the name of the paving.

[Bec@LondonStone]

It's possible that the natural iron content of the stone is oxidising after being exposed in the open air and causing these rusty spots to appear. As higgness says though, photos and the name of the product would be massively helpful.

[RAPressureWashing]

Is the paving near a lawn?

[Dave_L]

I'm calling natural iron elements contained within the stone. Pics!

[michaelthegardener]

Is the paving near a lawn?

you thinking moss killer ? had a customer go mad with it and anyone would think his garden path is steel mind you its 60 year old concrete so hes not to fussed

[DNgroundworks]

I had rust stains on a patio once, i used a combination of Lithofin Bero and Lithofin Rust-ex, it worked pretty well from what i remember.

[KLS]

Same as DN goundworks Lithofin do some great products.

[KLS]

Same as DN goundworks Lithofin do some great products.

[RAPressureWashing]

Is the paving near a lawn?

you thinking moss killer ? had a customer go mad with it and anyone would think his garden path is steel mind you its 60 year old concrete so hes not to fussed

Moss killer or any Lawn feed that has spilled over on to the paving, as soon as the granules get wet there release something that looks like rust on paving.

[RAPressureWashing]

So many different types of rust or rust looking stains, Yes the Lithofin products work on most type of "rust" stains, depends on what caused the stain though