I asked my son to do a little research into how bronze armor is made and Finn did a great job digging through YouTube videos, DK for Kids, and elsewhere. This YouTube video was, in his opinion, the best explanation for how your Sartarite character might get that nice Bronze Cuirass made. And it is pretty remarkable to watch. A lot more hammering than I expected!
Here is his runner up – a surprisingly informative article from DK Find Out: