Reinstall Mountain Lion
I'm very familiar with my Mac and a retired geek...but this is a slightly convoluted reinstall question so I wanted to get a confirmation before doing. I have a 2011 MacBook Air and when Mountain Lion released I bought it from the MAS and installed it...no problem.
Now, since I've just purchased a new iMac I want to wipe the drive on the MacBook Air and reinstall Mountain Lion and sell it. Since the MacBook Air came with Lion, do I have to do a reinstall of Lion first using a restore (http://support.apple.com/kb/PH10763) or is there a way I can download/install Mountain Lion directly from "Purchased Apps" in the MAS?
Also, since I have that particular version of Mountain Lion installed on yet another older Mac I own (installed from this same MAS version of Mountain Lion), should I install "only" the original Lion OS on the MacBook Air before selling it? I want to retain the license I bought in case I have to ever reinstall ML on my other Mac. Or, by virtue of buying this new iMac that came with ML, does that give me the right to use ML on any computer I own?
Sorry for the confusing questions...I just want to make sure I'm doing the right thing. Thanks.
iMac, OS X Mountain Lion, 2013