I rivited some sheet alluminum, siliconed, and covered everything with coat of undercoating. The rust went half way down the wheel well on the cab side so it was quite extensive. Could not get at it from inside the trunk to weld any thing, the strut pillar is in the way. My other questions is do any of you think the integrity of the car is comprimised because of this rust? I would hate to be in an accident and have it open up like a soup can, my kids ride back there.