Anyone know how to remove spardash? Its like fine chippings of granite glued to my exterior wall. where the wall has become damp round the ground it has become loose and i am able to put a scraper under it and i comes away like wall paper. However most of the rest of the wall the dam stuff is stuck fast. Is there anything that will disolve the glue or does anyone know how i can be rid if this god awful stuff? So far all i have removed is the skin off my knuckles.