I think you've unknowingly debunked non-stick layers.
Should make it from RVS.
Re:Throw Out Your Black Plastic Spatula
by ansonhoyt on Monday November 04, 2024 @11:08AM
(#42042873)
The latest issue of Fine Woodworking agrees and explains why this is true:
* "The Best Food-Safe Finish May Be None at All", https://www.finewoodworking.com/2024/10/10/the-best-food-saf...
TLDR; unfinished wood that is rinsed and dried on all sides will naturally trap and kill bacteria as it dries. Any finish interferes with this process.
There's also a risk that any cracks will fill with bacteria.