Kandla Grey - I messed up

[f0zzy]

Hi,

Last year we had a new patio laid with Kandla Grey - fantastic job. However over the winter some rust
spots appeared. Local hardware store suggested a chemical - acid based to remove them. I tried this and
while it initially appeared to work two weeks later large orange/yellow patches appeared.

Our paver suggested maybe using sealer to darken the stone - but if anything this probably made
it worse.



Any suggestions at all would really appreciate it -

https://www.dropbox.com/s/55xq9avfbiao6 ... 7.JPG?dl=0

Thanks

John

[f0zzy]

[RAPressureWashing]

You are going to have to remove the sealer first before you attend to the stain/damage the acid has caused, what sealer have you used?

[f0zzy]

There was two sealants used but in different areas - Protect IT Sealant and Larsen Path and Patio Sealer.

I've wondered would it be cheaper to replace it than try to repair it.

Appreciate any advice.

Tx

[RAPressureWashing]

It might be cheaper to replace?, depending on how many square metres you have etc, but you'd be looking at around £500.00 per day for a sealer removal service, it's a slow and messy task.

[f0zzy]

ill have to do the maths - its about 50-60 sq metres to replace so wont be cheap either way.

is there a chance that over time it will weather out ?

[RAPressureWashing]

You'd need to remove the sealer 1st, over time there is a possibility that the Iron staining may fade, could take months, years?, it may never go unfortunately.

[f0zzy]

Thanks Roger for info.

Will probably leave this over winter and see if it changes at all and then figure out plan in the spring.