Get a breathable car cover, got mine from halfrauds. Had it for at least a year now and protects the car very well. Their small size is a perfect fit for the mk1, its elasticated and includes straps that go under the car to prevent it from being blown off. It was nearly 50 notes but worth it. If you go for a cheaper plastic one you run the risk of moisture being trapped between the cover and the car. Made that mistake once before!