In the early 1500's some Spaniard's were trapped on the west coast of Florida. The ships never came back (or found them) and they were taking slow steady deaths from the local indians.
They had to build a couple of boats to get away. So, as they ate their horses, they would take the tack, make a forge on the beach, and fashion a saw, tools and nails out of the metal to build boats.
That was in 1525, with all raw local resources, except for the horse tack. The Spaniards were constantly driven back to the shoreline, and preferred that as they only had to guard 1/2 of the area and could watch for their boats.
So, they had the technology to melt down stuff. The Indians also utilized copper disc's to remove sweat from their bodies. No local copper, so they were trading with other indigenous tribes through a fairly well established network.
The history is fascinating.
Later tribes were melting Spanish metals for jewelry and trade.