Like many people I purchased a Smart Cover with my iPad 2 on launch day. Coming from the original iPad with the hefty Apple case on it, it's going to take some time to get used to this new cover, especially since I'm OCD about scratches. However I'm wondering if my fear of scratching the brushed aluminum back is irrational, as I remember the iPhone 1 and it's resistance to scratches. For those of you that had an iPad 1 with an exposed back, how has it held up for the past year? Do you think a skin is necessary to avoid scratches or is the aluminum body resistant to them? Thanks.