This case should be 6-layer, waterproof and weatherproof. I put it on my late father's 1984 Corvette to protect it. After the rain I took it off, to my surprise and anger and utter disappointment, THESE WHITE MILK STAINS ALL OVER THE HOOD. These stains were not on the car before using this cover (and after the rain). This is a chemical reaction. the reason for this reporting? Who will repair my Vetta! I AM VERY ANGRY