in the way i do bronzecasting it is lost wax.
you make somehting out of wax, attach sprues(get the bronze on and out tubes) encase that in ludo (plastery high temp resistant stuff) and turn the whole mold upside down in a kiln. when the kiln is heated the wax runs out and you pour liquid bronze in where the wax used to be.
then you bust the mold and spend a year cleaning up the bronze piece. this is how most bronze statues are made
metalsmithing is taking an ironbar and making it a knife, or making a pretty little silver necklace, or whatever out of metal.
casting=liquid in mold
smithing= beating it into shape
make sense?