All you need to know about metal engraving / etching / marking - EnduranceLasers
Amazon.com: Glowforge Plus 3D Laser Printer – The Fast, Easy, and Powerful Tool for Wood, Leather, Craft, Paper, Fabric, and DIY. The Ultimate Hobby Laser Cutting & Engraving Machine : Arts, Crafts
Tabletop Mini Laser Engraving Machine Desktop for Metal - YouTube