Can you export content and corresponding metadata in separate files for re-indexing/re-import?

Good Day,

I have a use case where there are 3000+ documents in the content server that a user wants to make accessible to the public, but before that can be done there are documents that have sensitive pages of information that need to be split from the original document and indexed with different metadata like document type and security group.

Is there a way to do this that does not involve the user needing to rescan all of the documents. They are prepared to manually index.

Our current idea (if it is possible) is to export the content with their metadata information into a watch folder that will be picked up by WebCenter Capture and using the Capture client the user can split the documents and index them and release them to the Content server as new documents.