I'm not sure that they are painted but it looks like they are. What are they for?

[![enter image description here](https://i.stack.imgur.com/K9MC2.jpg)](https://i.stack.imgur.com/K9MC2.jpg)

[![enter image description here](https://i.stack.imgur.com/MLPtz.png)](https://i.stack.imgur.com/MLPtz.png)

More images:

[![enter image description here](https://i.stack.imgur.com/1hCGf.jpg)](https://i.stack.imgur.com/1hCGf.jpg)

[![enter image description here](https://i.stack.imgur.com/crAnR.png)](https://i.stack.imgur.com/crAnR.png)