Fun Science Time

Mad Science Suppliers R Us.

Like everything else, you can get it over the internet.

Any laboratory supply house, many pool and spa care houses, and many hardware stores, as it’s an ingredient in most de-liming cleaners (read the labels first, as it’s often not the only ingredient and some of the additionals may mix badly with metals.) It’s also sold as muriatic acid. Wear safety goggles and nitrile gloves (they tear less easily than latex rubber gloves)

I’m pretty sure this technically illegal, fwiw, at least here in the U.S. Defacing US currency and what not. (I wouldn’t worry about it, though- there are plenty of publicly available machines that smoosh pennies floating around.)

Zen:
a) I mentioned penny-smooshing machines.
b) I’m pretty sure the penny already contains more than a penny’s worth of materials, with the copper and zinc.

Sounds handy! No harm done.

Pennies aren’t legal tender, and thus, aren’t protected under the law. Or so I’ve been told. That’s why there aren’t any nickel stamping machines at those tourist traps.