Body Work Tutorial

i'm no real " bodyman" but seems the modern way is expoxy and put filler on that. I do know some what are considered good shops that do it the old way, and putting filler over bare metal. seems to me if the metal has NO rust, this might be acceptable, but any car 50 years old will have at least some minut piting???? me, I epoxy, then filler, and put seal with epoxy over filler, then my high build urethane primer, but then too, I use acrelic urethane as top coat, so don't necessarily go by me!!
I have directly mailed the starter of this thread with some questions and he was kind enough to answer my questions.