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Rust stains on granite pavers

Boomtown

New member
Messages
12
Location
Argyll
Hi guys I’ve been asked to pressure wash some granite paving in front of a restaurant they have metal planters out side the restaurant, and they have left  the pavers badly stained with rust mark rings on them can anyone recommend were I can by the chemicals to remove them.

 
Last edited by a moderator:

Apw1210

Well-known member
Messages
3,802
Location
Devon
Hi guys I’ve been asked to pressure wash some granite paving in front of a restaurant they have metal planters out side the restaurant, and they have left  the pavers badly stained with rust mark rings on them can anyone recommend were I can by the chemicals to remove them.
I'd personally do a test patch clean using cemitone brick acid / driveway cleaner or diluted SH

 

K in Kent

Vendor
Messages
355
Location
Kent
Sodium hypochlorite won’t remove rust stains  
I wouldn't use acid either - get a specialist product designed for use on stone and removing rust. I have got 1 which is pretty good and I'll check it's name later and add it

 

Dave B

Staff member
Moderator
Messages
18,187
Location
.
Sodium hypochlorite won’t remove rust stains  
If anything it will make them worse as it rusts metal.

Oxalic acid is just the job for that.

Brick acid is strong stuff but oxalic is safer and good for the purpose of removing rust from things including lead stains etc from softwashing.

 
Last edited by a moderator:

Dave B

Staff member
Moderator
Messages
18,187
Location
.
People are scared of the word acid but oxalic acid is actually present in leafy green veg and legumes and rhubarb etc.

Not the greatest for your body but also not a strong dangerous acid like hydrochloric (brick acid)

 
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