[Steve_Simmonds]

Hi-

I've just got a job cleaning cement and such marks from block paving and patio slabs on new builds - I'm a bit worried about taking all the sand etc out of the block paving - what chemical's best for this?

[Muckypup]

steve i use an acid if it's really bad - but watch it! if its not too bad a pressure washer will get rid of it but have some fine sand as it will all get washed out of block paving.