Hello all. I have a slightly older 17 MBP that upgraded to Lion a while back. I'm thinking about selling my MBP to get a new Macbook air, but would like to make sure I properly clean my MBP before I sell it. With a windows machine I would just do a reinstall of the OS, but I of course don't have a disc for Lion since it came through the app store. Is there an easy way to do this, or maybe even an easy way to just wipe my data of the mac without doing a reinstall? Thanks!