I have started cleaning up my 535i. The door panels need some attention. I have noticed that the drivers side is in the worst shape and the covering is cracked, split and is shrinking. The panels seem be be some kind of foam rubber that was made to look like leather. Also the seal on the door frame has deteriorated to the point that it is smashed flat in some areas and has turned to a black goop that sticks to the door panel and has pulled off sections of the panel. Is this common? Or is this a botched RTV silicone repair? Its almost the consistency of road tar. what a mess. Does anyone have any suggestions? Can the door panels be recovered with vinyl? Has anyone had any success doing this?