hello bigbuffer here. can i ask you when he chiped the old dash of, did the plasterer scud the walls before putting the sracth coat on. what i mean is you must scud the walls first,then you scracth the walls, then you put your bands around, then you put the new dash on.tell me are the rust spots coming though were the bands are round the house.
and if they are then the plasterer put metal beads on instead of plastic beads.and what is happening is the beads are rusting. the only way to stop that from happening is to remove the metal beads sorry to say.
bigbuffer, August 2009