I have a brand new 2022 28bhs in fiberglass. you can see every placement of the interrior cabinets, supports etc through the fiberglass outer skin. They appear as virtical lines. Is this common with this unit? Some are rather pronounced.
I think it is somewhat common. I suspect it is the internal framing of the wall, that the skin is bonded to. My 23B shows some of it, but not at every framing member.