[Harry Roberts]

Hi All,

I have a customer who has had a house built and the builders have drill into the rede brick work to put up some fancy lights.  In doing so the brick dust has fallen onto the stone work and seemsto have gone into the stone. I guess the stone is pourous. Has anyone come accross this before and can anyone help with some advise.

I have attached an image.

Thanks in advance

[AJ]

I've never come across it, but I shouldn't worry about it. You're the window cleaner not the builder, its their problem.

[Mike_G]

Go on the cleaning section on this site, there are a few people on there who should be able to help you out

[Bushboy]

Bleach it ? 
It will bleach the red out , do a sample patch ,

[bobby p]

dust a bit of cement powder over it ?

[ian1972]

Try a small ammo untold brick acid leave for 20 mins then pressure wash should get it out