The process begins when the general cashier sends racks of rolled coins to Holsen, who empties the change into a repurposed silver burnisher.
Along with the coins, the burnisher is filled with water, bird shot to knock the dirt off, and a healthy pour of 20 Mule Team Borax soap. After three hours of swishing the coins around, Holsen uses a metal ice scoop to pour the loot into a perforated roast pan that sifts out the bird shot.
The wet coins are then spread out on a table beneath heat lamps.
This is where once-rusted copper pennies turn into shimmering bronze coins.