Get rid of rust first, then work in the interior. Thats what im doing, first job was to replace the boot lid which was the only area with rust. The cars has the brakes fixed with new calipers and pads and discs to ensure the car is mechanically sound. Now im working on the interior restoration before i start on the paintwork, so new steering wheel which isnt worn out, new seats, door cards and carpets also. Seeing as i spend most of my time inside the car i wanted to get that right first.