Any fix for this limestone?

[J Sid]

Spirits

 

[Tile Shop]

Wouldn't advise oil personally. Yes it would deepen the colour of the limestone but it will also highlight the spots so not fixing the problem, just darkening the whole lot.

LTP have just produced a new product. It was aimed at landscapers who quite often spot-fix stone with sand and cement and end up with the same problem. From what I've heard it sounds like some kind of voodoo magic but the director assures me it will penetrate the surface and remove the spot marks. Its the "Cement, Grout and Salt Remover". Also suitable for removing grout stains and haze from all forms of un-polished stone.

LTP Cement Grout & Salt Residue Remover - https://www.ltp-online.co.uk/prod/ltp-cement-grout-and-salt-residue-remover

If it does work, could be a good little problem solver several types of issue.

 

[siobhan watson]

I kept getting salt residue on my white limestone.
The last time I scrapped it off I tried sealing it with coconut oil.
It darkened it slightly but haven't had any salt deposits for over a year.
It is lightening up again and will probably need doing again shortly.
Worth a try.