Laser
We have an 80W 60cm x 90cm CO2 laser machine which can be used for cutting and engraving.
This is often used for reverse engraving plastics before infilling with paint for front panels, or for cutting plastics before they are then printed for their specific application.
The reverse engraving gives a very good rugged front panel where the design cannot be scratched away, damaged by cleaning chemicals or have dirt ingrained in the front engraving as commonly happens with rotary engraved traffolyte style materials.