Please refer to section 2.5 of your user manual for a more comprehensive list and safety guidelines, but you can use a variety of materials, including various plastics, wood, ceramics, glass, textiles, leather, rubber, and stone. In addition, you can remove surface coatings (type I/II anodizing, paint, powder coating) from metals to expose the bare metal underneath the surface coating, and you can mark on raw metals with a marking spray. You can find your CO2 laser user manual in our download center or on the product page for your laser.