I just discovered a pit on my MBA. It wasn't there yesterday! I've only had the computer for about 6 months. I don't know why it started now, and not when I was sweating so much on it last summer. I haven't even been using it that much over the last couple of months. *sigh* I wish I had put protection on it, because I don't want to hurt the resale value. How was I to know that I had Alien sweat? Can anyone recommend some good protection? I gather from earlier threads that Marware ($25!?) and Moshi ($20!?) are the best products. Do you have any other recommendations?