How to prepare MBP for sale (ML --> Lion)?

[cntwtfrmynwmbp]

Hi there

I'm going to sell my mid 2012 cMBP 13 inch.

It originally came with Lion. I've updated to Mountain Lion in the meantime (I got a free update from Apple because I bought the MBP about 1 month before the release of ML).

I can only sell it with Lion as it is against the licence to sell it with ML as I've got that from the App Store.

From my understanding I have to restore the MBP through internet recovery (by holding command + R when booting up).

Will there be an option to restore LION although I have updated to Mountain Lion in the meantime??

Edit: one more question: The MBP has an SSD. I've read somewhere that secure erasing may harm the SSD. How to deal with that?

Thanks for your help!