During the last 4 years I traveled with my aluminum Macbook Air 13 for about 2 years. Didn't notice any scratches on top the lid. Unfortunately, different story with SP4 after just one month of traveling. Same guy, same attitude towards how to keep your laptop safe, but different results. All the time SP4 was either on my lap or in backpack's sleeve for a laptop. The only thing I could think of what could have damaged my tablet is credit card that i keep there (so not to have all of them in your wallet when you travel). But I did that when traveling with Macbook as well. Yes, SP4 is cleaned with wet/dry tissues before making this photo And unfortunately I don't get BSOD or white spots on the screen so there's little chance that this device one day will be replaced for me.