Driveway stains

[wesley 15]

Landed a job today with a customer who wants driveway washed. The driveway is only 8 months old but it has mud stains from the consrtuction and brown stains from fertilizer they dropped when spreading a couple months ago. I believe the brown is from the iron in the fertilizer, and I think I can remove it with some acid (aliminum brightener). Any suggestions or thoughts would be greatly appreciated.

[wesley 15]

Is there any one out there with some advice for cleaning the brown stains caused from the fertilizer.

[R L S 14]

If your acid wash didnt get it I am not sure what will. I know for leaf stains straight bleach works.

Richard

[Washaway 64]

bleach does for the leaf stains but I've experienced, from my own property, that the fetilizer stains go away on their own. They look nasty and rust like but within a couple of weeks they're gone and it's like nothing every happened.

Maybe the water, from the sprinklers, dilutes it.

[PLD 14]

Any iron based stain will need acid to reduce it. I don't know what's in your alum brightener. I'd start with Oxalic and get stronger in steps from there.