Seems to be a real thing[1]. I took you literally at first, but I guess you mean you’re looking for a specific result and not seeing it? This article[2] makes a case for using (pure) flax oil and a special procedure.

[1] https://en.wikipedia.org/wiki/Seasoning_(cookware)

[2] https://sherylcanter.com/wordpress/2010/01/a-science-based-t...