Automatically Marking Tapes in a Clone as Read Only

Is there a way to mark a set of tapes used for a clone as Read-Only at the completion of the clone job? The clone occurs at the end of the normal backup.

I'm trying to establish a monthly routine that does a Full on the 1st and Inc's the rest of the month to Disk. Then I want to clone the savesets to tape. When the last clone set finished, I want the tapes used in the set (or at least the last tape in the set) to be marked read-only so that next months full doesn't start to clone to the current month.

I understand the wasted tape issue, but I'm trying to simplify backups for junior folks to take over, and so far haven't found an easy method to show them which tapes to grab for off site storage.

I didn't want to have to create a media pool for each month of the year and the corresponding groups that go along with that.

Thanks for any thoughts!

--Joel