We used to kill fungus infections like ringworm with a saucer of vinegar, some real copper pennies oxidizing in it till it turns green, then dab it on the fungus till it goes away.
Real Copper pennies are hard to find now days. I also used some scrap copper from other sources. Barely submerge them in the vinegar and allow the air to oxidize them.
Pennies minted before 1982 are copper. Dirt common.
It occurs to me that the copper- plated zinc pennies might do just as well, or better. Zinc is no friend of fungi.
You made copper acetate, cooper salts can be anti-fungals. Could probably use copper sulfate or use zinc with vinegar- zinc salts should have similar actions.
Copper wire is easy to find at any home-goods store.