Think twice about that... I've read on some other forum (sorry, don't remember where exactly) thread by some guy who broke the screen in his Air, and since he didn't want to pay Apple's price for repair, he attempted to do so himself. The conclusion was that the upper part of the case needed to be replaced as well (he destroyed it in the process and it seems nearly unavoidable). I like your MacBook with old Apple's logo, by the way .It took me three hours to do my MacBook. I looks like no one has done it on the Air. The place where I got the transparent film from doesn't have instructions for the Air.
I am going to wait to buy the next Air and I'll change the logo color just to make it mine (special).