I recentlyhad to repaint a rental unit that had a fire in the kitchen. The fire damagedthe cabinets over the stove and left burnt smelling black soot throughout thekitchen and common areas. The kitchen had to be totally cleaned with a strongTSP solution and the ceiling primed with Bin shellac based primer before thewalls ceilings and trim where repainted. The smell of this stuff is prettyintense but dissipates quickly. Oil base primers are only sold in quarts now inCalifornia and will do the trick on a job like this if you can stand the smellfor the 24hrs that it takes to cure.