nice door panels!
i was also concerned with the cardboard door panels i ordered online, so i did an intermediate fix, i just glued some old vinyl school bus seat material to the cardboard before installing the metal trim, time will tell if that's sufficient
but if i do it again i'm gonna go this aluminum sheet method, many more seats in the school bus to cut vinyl from, and two colors to choose from, grey or traditional brown

about the roof... yeah... i did such a bad job on the roof, but in my defense, it was my first one, i did it alone, it's a work truck so it didn't need to be show quality
i'm sure the second time will be much better

-s