Hi,
I have some strange staining on my patio concrete paving stones which I am struggling to get rid of. I have tried a jet washer which cleans up my other paving stones well but won’t clean these stains. I also tried pure bleach but no change.
any advice would be much appreciated.
p.s. the stones are about 10 years old.
thanks
I have some strange staining on my patio concrete paving stones which I am struggling to get rid of. I have tried a jet washer which cleans up my other paving stones well but won’t clean these stains. I also tried pure bleach but no change.
any advice would be much appreciated.
p.s. the stones are about 10 years old.
thanks