445nm lasers are great at engraving. It can "cut" organics (cardboard, leather, wood) but ideally you want a CO2 laser for cutting. But... This is mounted to a Router. So use the appropriate tool for the job. Engrave artwork with the laser then switch tools and cut it with the router. Super fast, clean, perfection

 

Probably not, and the reflections will cause eye damage
Its not just a power question, its about the wavelength. 445nm Near UV absorbs into organics like cardboard, leather, wood (to engrave/cut it needs to absorb the energy and turn it into heat) - aluminum won't absorb UV light, it will just reflect it. To cut Alu you need 1micron wavelength Fiber lasers. Even the 10600um Infrared of a CO2 laser won't really work on it