You can probably wipe the main partition and restore from the restore partition BUT none of the data you wiped would be irretrievable. Then again, I believe they’ve had some luck restoring data from low-level-formatted, shot with a shotgun drives. If you’re truly paranoid about the data, you’ve got to pull the drive. If you just want it mostly inaccessible for all practical purposes, go ahead and wipe-and-restore.
The pentecostals will now wait for the interpretation.