Hi
I have been asked to clean some brickwork which has years of pollution on it. I will try steaming it, but if there is a chemical I can prespray it with to help that would be great... any ideas folks please?
About (100 square metres to clean so could do with it being able to be sprayed rather than brushed on, although if needs be, then it can be done).
Also, if there is a chemical that would do it without the need for steaming then that would be even better.
Thanks
Andy