Hi all, I've been asked to pressure wash a front facing brick wall with dead ivy laced across the front of it, the ivy was stripped off last year but the remaining roots that have bedded into the pores of the brickwork remain and have gone a grey colour, the brickwork is a yellowish cream colour and there is a small area that the customer has done with a scraper but has left him with a dark bruise type effect on the brickwork.
any advice would be most welcome
Thanks
Graham