Resin bound driveway iron aggregate stains

[DeLaCruz]

Driveway has iron small stains in patches about 2/3 inches round in dotted around - apparently the aggregate was contaminated. Fwiw the client is resigned to the scars but I would like to try and use something like oxalic to see if this is a fix - anyone done anything like this?

Also he wants the entire resin serviced to remove the darkened patches - i wanted to know if I should attack with a longer to work bioside technique or just go down the hypo route + light pressure wash ? I have no experience with resin bound but know it’s porous so maybe same as pebble dash ? Will get some pics but any advice welcome thanks ?

 

[scottish cleaning service]

Driveway has iron small stains in patches about 2/3 inches round in dotted around - apparently the aggregate was contaminated. Fwiw the client is resigned to the scars but I would like to try and use something like oxalic to see if this is a fix - anyone done anything like this?

Also he wants the entire resin serviced to remove the darkened patches - i wanted to know if I should attack with a longer to work bioside technique or just go down the hypo route + light pressure wash ? I have no experience with resin bound but know it’s porous so maybe same as pebble dash ? Will get some pics but any advice welcome thanks ?

I wouldn't tackle it because it might make it worse and easier jobs out there. Good luck and will be great to hear how you get on.

 

[DeLaCruz]

Well essentially the iron stain removal is not the main job - the place is a really high end new build and the customer is mainly after the resin bound paths cleaning - I know if I could do the iron patches aswell it would be a great thing for him and he would pay well for that - that’s why I was enquiring. Even if the patches are left it’s not gonna be a problem but I just wanna do a thorough job (and get paid more

 

[scottish cleaning service]

Well essentially the iron stain removal is not the main job - the place is a really high end new build and the customer is mainly after the resin bound paths cleaning - I know if I could do the iron patches aswell it would be a great thing for him and he would pay well for that - that’s why I was enquiring. Even if the patches are left it’s not gonna be a problem but I just wanna do a thorough job (and get paid more

I would contact the resin suppliers and ask what they recommend. ?

 

[K in Kent]

Assuming the dark patches are algae I'd go with a weak hypo mix to start with and boost the strength if necessary followed by pressure wash (using cold water only).
For the rust I'd try something like Rust X Pro which is an effective multi surface rust remover. Again starting with a weak mix on a test patch and go stronger as required.

Sorry, forgot to mention pre-wetting the surface which is best practice when using all chemicals, in my opinion anyway.

 

[scottish cleaning service]

I wouldn't attempt it, too many negatives for risk verses reward. I would let them find someone else to do it even if it was a window cleaning customer. fwiw