Costing around half a million dollars in 2017, maybe someday we'll see them in the centre aisle of Lidl. It uses a process called laser ablation or photoablation, where energy from a laser turns rust into gas by sublimation (I.e. it doesn't pass through the intermediate liquid phase., unlike boiling ice to form steam where the ice melts to water first). At higher laser flux, rust is converted to plasma, the fourth state of matter (solid, liquid and gas being the other three).
