Mortar stain on limestone paving

[mylesw]

Does anyone recommend a product for removing mortar stains from limestone paving?

I appreciate anything acidic is a no no.

I wiped away the larger bits of mortar but it has left a haze/residue which isn’t shifting easily.

I’ve tried jetwashing but it’s not made much difference.

Thanks

 

[JD2012]

Spear and Jackson Spray and Leave maybe. I have used this on my slabs though they are not Limestone. Check the instructions before use. You can get it from B & M Bargains. B & Q don't stock it.

 

[Mike13]

Small glass of vinegar and a small toothbrush, scrub the worst bits and use a watering can or a hose if it looks like the limestone is being attacked too much. Or a very small and sharp cold chisel, taking off one small bit at a time. Limestone and cement will be attacked by the same things, so not many other options. Sit down in the sun with a beer while doing the job.