You could try to copy the disc with another drive as reader. Just because your drive canâ€™t, you might succeed with another drive as reader. Plextor drives seem to do a great job for such a task.
Or you could try: the toothpaste trick
If your disk is full of scratches, these might be filled with dust. You could
try to put a small amount of toothpaste on your disk and clean it off with some soft material. Move from the centre of the disk and out, not in circles.
Rinse it with some lukewarm water afterwards.
Or you could checkout a skipdoctor.
Use the above trick on your own risk. All I can say is that it never did any damage on my CDâ€™s.