I have a lot to consider now. Thanks, y'awl!
I might poke the No. 4's blade through a tea bag and see what happens. Getting hold of Jarlsberg cheese would be a little more difficult. A tangerine would be easier to find and smell more pleasant.
I'm happy to report that the potato smell is fading and a little time for the vegetable oil to soak in resulted in a blade that's much easier to open and close.