how to get paint off a path way/ paving slabs??

i've just painted the outside of a garden wall and splattered the pathway by the road. i didnt notice at the time as it was only a small area. the guy whos house it is moaned about it but i cant get it off. i've used a pressure washer (although it was a small one), patio and brick cleaner and i've tried bleach which someone recommended. none of which have worked.

the paint was a weathershield exterior white matt paint.

any ideas????

try using paint stripper.but be careful and wear gloves and goggles.dab this on to paint and leave to soak for a while.read instructions.then wash area with clean warm water. from simon the builder