Removing cement splatters off brick wall

Not sure if this would be the right section to post in or not, sorry if its not :(

My question is how do you remove cement splatters off a brick wall ?





We are currently doing a project in that area of the garden (thread on here) but OH last year was making a fake rock background for his fishtank which involved using cement, and this is the area he used to mix all the cement etc.

The wall is splattered in cement and I have tried brushing it off with a wire brush and I have also tried jet washing it but nothing :(

Any ideas ? Is there something chemical that will shift it easily ? Or anything anyone can suggest as it looks ugly :(

 

Thanks - am going into town shortly so will pickup some white vinegar and give that a go (if it ever stops raining today!).

If that fails will get the acid - although think that will definately be a job for OH who made the mess anyway

I just wish I had realised at the time, would have been easier but it was winter and too cold to go outside to watch him! Didnt though realise he was washing the buckets out and throwing the weak cement solutions over the pebbles, which has now set rock solid !

 

OH is at work this week whereas I have the week off, plus he has just built me a lovely planter and is putting some decking down at the weekend in that area - so dont wanna push my luck

Where the pebbles have set hard, its not so much of a problem as will be raising the depth of the pebbles there by a good few inches anyway once the deck path is done, so all that will be hidden underneath. OH did try breaking some of it up with but it wasnt shifting, so we just re-thought our plan so that it will be hidden!

Will follow instructions and report back ....... when the rain stops of course!

 

Ive used brick acid for this before.

Try the vinegar but if this fails use brick acid, start slightly dilute then increase the concentration until you get to a strength that will shift the mark. Obviusly wear goggles as the scrubbing action is sure to flick it up!

If you go to a builders merchant, ask for brick acid rather than bond it, bond it is one of many trade names and you may well get a funny look or the wrong stuff.