It will depend on the material under the paint. Any particulate board you will probably want to replace. Wood can be dried, sanded and repainted depending on the depth of the damage.
But you will need to check the state of the material under the paint to know for sure.
Edit: looking closer at the picture it looks like melamine maybe? If that is the case you should replace it if possible.
I like to have them on esphome. In my case I have them as Bluetooth proxies and also use them with Bermuda BLE triangulation (in addition to the air quality stuff).
I have a Airgradient One (indoor) and a Airgradient Open air (outdoor) and love them. They are Esp boards with esphome configs available. They use readily available component that makes sensors easy to replace when they wear out or loose accuracy over time.
The whole project is open and you can buy the DIY kit and build it yourself or buy a prebuilt one.
The latest release is dated 2 days ago https://github.com/markqvist/Reticulum . Actively supporting is not the same as actively developing.
This should probably be taken as “I am tired of supporting everyone who did not RTFM, too bad if you can’t make it work” and is a totally reasonable thing to do, especially as the project gain more traction.
There is a pretty good community around reticulum that is usually supportive.
I’m going to play devil’s advocate here.
Paying a contribution will not give me the feature I want or need from a project, most project explicitly say so. Paying for a LLM to create a PR or a fork that will contain that feature is often a lot easier and a pretty good guarantee I will get it.
I am not diving into the code quality or maintainability of such PR/forks which is a whole thing in itself.