I quickly made an air adapter for my cheap laser engraver. This replaces the orange laser shield and allows you to hook up a cheap air pump to reduce burn marks and make cutting easier. Depending on the print settings you use, you may need to cut the tip off of the nozzle, but the depth of the side walls perfectly matches that of the standard shield so you can still use the factory piece of acrylic to focus the laser.

Mk3 is the one to use - mk1 works, mk2 does not work well at all. Mk3 is optimized for airflow and avoids kinking the hose.