Bout a year ago, I got rid of all my scratched up portfolio sleeves, threw them in the trash and haven't looked back. Since then I have been using, double sided, fine art paper that has been pre-drilled and scored by Lost Luggage . See them in use (here). Good Stuff! I have gotten nothing but rave reviews since. They are expensive, but you won't have to replace your nasty, hard to see through pages every time the book comes back or when you leave it in the hot car.