I used to have that fear of scratching my pad and was almost like the "anal retentive chef" off SNL (google it). I had a case, then a film protector, then a sleeve to put the whole thing in and realized I was going too far - so I settled on a smartcover and clear snap on back. Flitz and a polish rag takes off minor scratches - and I've never scratched the glass yet on 4 pads...
ask yourself if you're going too far...
So it never scratched your iPad? I read so many story's about scratching iPads with the Smart Cover. Any one experience that problem or know of somebody?