No, No, No!
The best way to open a Mac Mini case is to get some hard wire, preferably plastic coated and loop it through the ribs in the vent slots on the bottom of the case and then wrap the ends of the wire together so that you have a loop. I do this on all 4 side and then gently pull the loops and gradually work the case open.
Works great and no nastly putty knife marks on your case!
