How about artillery shells in anvils instead? The only problem with the swords into plowshares analogy is that swords don’t kill or maim you when you hit them with a hammer.
This is the seventh US 105mm howitzer shell I’ve found in Laos used in this manner. They are used by the village blacksmiths as anvils to make farming implements and other tools. Probably the most utilitarian usage of Unexploded Ordnance (UXO) that I’ve found.