Plastic light shaft - Treat the insulation again?

Hello, please excuse my amateurish description... I am not very familiar with the technical terms. The basement insulation is of course made of Styrodur and not just Styrofoam... ! I just wanted to close the thread and let you know that it was fine for the external expert... even if it doesn't look nice. Regards

But it looks a lot like styrofoam

We have the same problem because we want to start plastering the base soon.

Our mea light wells are also screwed directly onto the styrodur.
I would now like to visually enhance them.
Probably put a mesh on it and plaster.
It will surely hold, right?