That's certainly the complicated way to accomplish a simple task.
1. Step one - edit and redact document.
2. Step two - print out the redacted document.
3. Step three - scan in redacted document, in PDF if your scanner supports that (if not, use the image type of your choice, and then plug the page sized images into a new document.)
4. If it isn't already in PDF format, convert it and email it. (Note, if you use Open Offie instead of Microsoft Offie, conversion is much simpler.)
All of the metadocument info is gone, and the file you are sending doesn't have text that can be uncovered or graphics that can be enlarged.
I'm learning a lot from these comments. Luckily, I don't have to redact material in my work. The photos I take or what I write is good for everybody.