1st Pic is a three car SP articulated diner set I kit bashed about twelve years ago for a sixteen car quasi authentic Coast Daylight consist typical for 1941. The 2nd Pic shows one of four sets of two car articulated coach’s for the same consist. This was done several years before 3rd Rail (Golden Gate?) offered their superior versions.
3rd & 4th pics show the car vestibules made from c. 1/8” thick wood bulkheads covered with painted thin Sheepskin leather acquired from a former pipe organ technician. The white foam block inside provides just the right spring action.