been booked to clean a large area of tumble block, most of it is straight forward, but the guy had some rendering work done on his house and the contractors he used left there usual trade mark, (see attatched photos) as it's render will it come off easier than cement, is there anything i can put on to
loosen it up first, or is just down to hammer & chisel and good old turbo nozzel?
thanks in advanced,
jim.