I played around a bit. 1 ingot of metal makes a boss and a couple of other small pieces. 2 ingots (and 3 ingots as well) makes the ring to the shield, but I couldn't figure out how to make the main part of the shield.
oh derp. I done did it too.
didn't realize this post was Necro'd from a version where the game didn't have proper shield making... 300+ days lordy loo...
Please Ignore this post. unless you need actual 0.0.9c information.