try Bandai. They (at least in thier DVD's of their highly popular TV series) have a video montage set to music of how the models are desinged, sketched out, created in CAD/CAM, milled, machined, tooled and molded, then sorted and packed. Its a great piece of video that highlights thier Japanese factory which is pretty much state of the art.
Also many moons ago Finescale Magazine did a report on the Revell factory. At that time a Camero and some Batman related items were being produced and highlighted in the molding process.
Both of these revolve aroun scale plastic injected (the most common type) kits.
Vacuform, resin and metal kits are created under different proceses than injected kits.
HTH
David
Build to please yourself, and don't worry about what others think!
TI 4019 Jolly Roger Squadron, 501st Legion