Realize roof overhang with plastic panels

Hello everyone,

I am currently considering how the roof overhang can be clad on our new detached house.
On the gable side, we have two rafters protruding each (total overhang without facing and insulation layer = 50cm). See attached pictures.

Is it sensible to attach plastic U-profiles from, for example, Fa. Heering directly onto the rafters and then attach plastic panels onto the rafters?
Or should a sub-battening be realized so that the rafters can still be seen later?
With which execution do I have to pay attention to ventilation?

I am looking forward to your explanations and ideas.
Thanks and best regards
Julian

Maybe just try googling in the right subforum or even join the questions in parallel forums.
https://www.hausbau-forum.de/forums/Maurer-Maler-Gipser-Elektriker.20/

First of all, this is an aesthetic question. The rafters are a definitely presentable structural element. It's actually a pity that wood was not used between the rafters from the beginning. I would not worry about moisture intrusion - but I would briefly consult with the "roofing people." My first idea is to paint the gaps - matching the color to the house.

Pro: More attractive appearance Contra: The rafters would then also need to be painted regularly How could I install an additional battens here to attach the plastic panels to?

Wood protected from rain only needs to be repainted when it no longer needs care. Unfortunately, the boarding between the rafters is missing. I would board it from below, matching the house with wood or panels.

Could the formwork still be built usefully afterwards (now)?