Is it possible to duplicate a Portfolio Project page and use it as a regular linked page?

Site URL: https://www.noahsuppin.com/

Because you cannot password protect an individual Portfolio Project Page (you can only password protect at the Portfolio level), i was wondering if it's possible to dupe the Project Page and recreate it as a regular linked page so i can password protect it. 

Or, would it be possible to convert all Project Pages so they're not nested inside a Portfolio? That's prob too advanced...