The seats were removed for better access. After the oil was allowed to soak in, the seats were cleaned with the included leather cleaner. This removed all the excess oil and dirt. After this, the seats were wet sanded with the prep agent and 400 grit sandpaper. This removes a lot of the old hard dye. After this, the minor cracks were filled in with the crack filler. Again, this was wetsanded and the seats were cleaned one more time.