Lock a mail merge doc in Writer

Lock a mail merge doc in Writer

Short story I've created some CRM merge docs in Writer and I'm sick of staff changing fonts and layout on a whim. All they need to do is hit Finish and Merge then print the doc.

Is it possible to make the docs read only to everyone without admin account or to require a password to save?

While I think about it can the doc merge the data fields automatically when it opens rather than hitting "Finnish and Merge"?