The dashboards are made of quality fiberglass mats and being professionally hand layed.
It's strong so you won't get any problems when the electronics or a tv / tv's are installed. The lines that you see on the dashboard are seams from the mold itself, because the mold exists out of several pieces else the dashboard can not be released out of the mold itself. The seams can be easily sanded down again to get a smooth surface.

Fabricating the two tv dashboard is the most difficult and time consuming part of all.