My forty ford was in the same condition, to save the seats, I always had a heavy navajo looking blanket covering the front seat at least. I never wore through the original material for the 30k miles that I put on it. The paint, I sprayed Pledge furniture polish on it. I tried to treat any rusted area under the car with DP-90 after I cleaned off most of the rust and in no time it looked it very original. I had spots on the hood where the heat from the motor made the paint just fall off. I finally had to spray some black DP-90 on those spots. This is what I did, good luck as you have a super car.