Joel at 3D Printing Nerd has a video on making PLA food safe.
This has been a thing for many many years. It also seals layer lines and prevents food and bacteria build up in small cracks and such. One thing Joel does not mention is there are a lot of types of resins inside of the food safe range. Rapid cure resins ge hotter than slow. A rapid cure even in a thin layer gets noticeably warm, hot even. I would not suggest a rapid cure at all. I used to use polygon zoopoxy and it got hot enough in a warm shop to melt 3d prints.
I think that this is the main point of the video since you can get food safe PLA, which really isn’t safe because of the gaps trapping food.