Rust stains off limestone

[Hack Attack]

How would you approach these? I tried non acid carpet rust remover with no luck.
The "idiot gardner" (who I think was the husband as he sat there looking adequately subdued) spilled fertilizer on the pavers and didn't sweep it up or rinse it off.. @Mikey P

 

[Hack Attack]

I didn't have to look at my bootied feet on this one

 

[Hack Attack]

I was thinking maybe making oxalic acid paste?

or am I on wrong track?

its on quite a few over an area about 15ft x 25ft they're not worried about the current pitting or scratches just the staining

 

[Andy]

You are probably fighting a chemical in the fertilizer, so it is not just a rust stain. If it is yard fertilizer they may contain phosphates and ammonium nitrates. How would you fight a urine stain on limestone? Might have to be your thought process not rust.

 

[Mikey P]

Looks as honed as can be, try Wink or what ever you use on fabric

If that process some how dulls it even more, take some 200 grit wet sand paper and feather it in

 

[Stephen D. Gillett]

Sounds like it goes very deep. An abrasive pad like a Hone pad, or 7" 200 grit Revolution pad with water may help remove some material to get a little deeper. I'm not saying leave dipping or going too aggressive; just spend a good 30 seconds to a minute on it. Then try your chem products. Of course I will recommend using STONE PRO Stone and Glass scrub to help agitate an bring out rust discoloration. Even a 3m green/blue pad with the Stone Scrub has removed rust left from rod iron chairs and tables from Travertine for me.

 

[Hack Attack]

I think I'll be back out there next week, they're a good 45min drive away

 

[Old Coastie]

Dan, why do you think it is rust, rather than an organic stain?

 

[Hack Attack]

Dan, why do you think it is rust, rather than an organic stain?

the bag of fertiliser was ferrous sulphate based (iron) in the 2nd pic of the grounds its also on the steps going down to next level

 

[Hack Attack]

its an amazing property they do weddings and corporate retreats, they call me several times a year for carpets if a wedding gets messy. Pulled multiple red wine stains out of beige wall to wall wool

 

[Old Coastie]

the bag of fertiliser was ferrous sulphate based (iron) in the 2nd pic of the grounds its also on the steps going down to next level

So the stone looks tumbled and dull; why not use Barkeeper’s friend and a good scrub brush? It won’t eat the stone like some acids, but it would certainly dull a shiny finish.

If the stone has a sheen, you could always just use a foam disk and some travertine polish, or just good old car polishing compound. You’d buff it up a little, to match the area.

 

[Stephen D. Gillett]

View attachment 79437
its an amazing property they do weddings and corporate retreats, they call me several times a year for carpets if a wedding gets messy. Pulled multiple red wine stains out of beige wall to wall wool

WOW

 

[DAT]

View attachment 79437
its an amazing property they do weddings and corporate retreats, they call me several times a year for carpets if a wedding gets messy. Pulled multiple red wine stains out of beige wall to wall wool

Those windows looks easy to do..at least they aren't french french panes...

 

[Rob Fairfield]

This is the best product I know of for rust. especially on natural stone.
http://www.front9restoration.com/

 

[DAT]

Looks simliar to oneRestore

 

[SuperDave212]

u can put down a white paper towel and cover in 40 clear...what woman dye their hair with and cover with a plastic over night....if that doesn't work regular pool choline works sometimes...I tried that front 9 restoration...never worked on anything

 

[ted mcfadden]

If this is rust, klenzstone will take it out or off in a few minutes.

 

[Hack Attack]

If this is rust, klenzstone will take it out or off in a few minutes.

do you mean klenztone products? google is giving me no love searching klenzstone