Removing a scratch from the iPad back with Meguiar's Scratch X 2.0
Within three weeks of getting my new Ipad and with extreme caution of use, somehow I managed to create a 1" long faint scratch on the back of the unit. These kinds of scratches are unbelievably easy to make since the back of the unit is only anodized aluminum, a relatively soft metal with a coating that accentuates any scratch. So I'd recommend anyone who cares about such scratches either put on a plastic coating like ArmorSuit MilitaryShield or get a case over the unit immediately after taking it out of the box (oh, and, by the way, some cases will themselves scratch the unit as will Apple's Smart Cover around the hinges - even if Apple doesn't admit it).
I tried to reduce the faint 1" long scratch's visibility using Meguiar's Scratch X 2.0. I rubbed the polish with a microfiber towel across the scratch (i.e. perpendicular swipes) for about 15 or 20 minutes applying between moderate to fairly high pressure with my finger. The scratch was not removed, and that's expected because you really can't remove a scratch unless you reduce the material to the depth of the scratch or fill it with something; neither of which this product does. Indeed if Meguiar's did reduce the metal surface that much, the anodized aluminum finish would probably be removed and the case appearance completely ruined. However, Meguiar's reduced the scratch visibility by about 70% to my eye. I did take pictures to try to prove this, but they are not helpful because the camera's view of the scratch is almost entirely dependent on the angle of it with respect to the flash, so my camera simply cannot capture the real visibility of the scratch.
So did Meguiar's alter the color or nature of the anodized aluminum around the scratch? Yes, it did, but the effect is so slight that it would hardly be noticed unless you look at the surface at exactly the right angle with respect to the light. It basically slightly increased the luster where I rubbed. But the small increase in luster is nowhere near the increase a plastic coating results in, so for me it doesn't matter since I plan on applying the ArmourSuit (again). Other than that there was no real effect on the surrounding surface.
Summary: With a little elbow grease, Meguiar's Scratch X 2.0 reduced my new iPad scratch's visibility by approximately 70% and did not damage to the unit in any way. I recommend it for iPad scratch reduction if you made the mistake of not protecting your iPad, have a scratch, and are obsessive enough to be motivated to reduce it. Otherwise, I'd just save you money. Incidentally, Apple has purchased Liquidmetal technology around the launch of the new iPad. Liquidmetal is a patented amorphous metal alloy that promises the workability required for case molding yet is as strong or stronger than steel, so I suspect Apple's notoriously easy-to-scratch casings are soon going to be a thing of the past.