[Innocence & Experience]

Hi All
I have an elderly window cleaning customer that has a coloured stone driveaway that has 'white marks all over it that look like possibly salt deposits.
A door to door guy persuaded her to have it power washed and assured her that the white marks would be gone but alas they're still there.
Do any of you guys know what these white deposits possibly could be and know how to remove them.
Any help appreciated as this isn't my area, just want to help her out!

[Innocence & Experience]

Its Pattern imprinted concrete and the marks are not visible when wet but appear when it dries.

[Kev Martin]

What colour is it?
Any photos?

[Innocence & Experience]

Unfortunately I’ve taken a photo but it won’t let me upload it due to its size!!!!!!
It’s an orange/ red colour.

[Mike Halliday]

Upload it here and post the link..

https://postimages.org/

[Innocence & Experience]

Thanks Mike - hope this has worked.

[Innocence & Experience]

This probably isn't the best photo Mike,  the centre of the photo shows some of the problem but if you look in the top left hand corner you can see 'white misting' in patches which is all over the driveway.
Any ideas?

[Kev Martin]

All I can see is a dirty drive that looks like it will clean up beautifully with a a rotary scrubber, some heavy duty cleaner and honing powder!  Sorry