If you are using 250 bar, isnt that around the 3500 psi mark? I didnt know there was such a machine.
If that is the case you should be able to clean just about anything. At the moment I am using 1200 psi,
very hot and clean most everything even if it takes me a little longer. Again try to break the surface of
the paint and you should be ok. At 3500 psi you will I am sure take off the top layer of the brick so the
paint should just vainsh along with it. Best, Dave.