Magic erasers work wonders on leather with some all purpose cleaner, just be sure to condition them afterwards. Nice project by the way.I have no idea how to get that "stuff" off the seats. the previous owner was a smoker and its like some sort of smokers crap
Open the hood and look at what it would take to replace the VC gasket on the bonne, then walk over to the giant trash pile and look at that one.
Soon you'll be talking about how great the Bonne koolaid is... lol