system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The powerful laser removing rust

How!
gpt
It's Laser Ablation, which is more or less "burning" off the rust. The laser used is probably a high intensity Nd:YAG laser(neodymium-doped yttrium aluminium garnet), or a laser that gives off a wavelength of light that metals absorb and convert into heat easily. It's the same concept as laser cutting, but only "cutting" the top layer of the workpiece.