The high pulse overlap achieved at 1000 ppi significantly improves edge smoothness. Sheet stock can be cut with factory masking, but the paper mask on the top will flame, so either take the paper off or use an air assist nozzle. This is necessary so that the vapors created during cutting have somewhere to go other than back onto the acrylic and also the sacrifice material absorbs any excess laser beam which otherwise would reflect back off the table and ruin the back side of the acrylic. Best edge when cut. Extruded acrylics do not frost when laser engraved.
Engraving is very clear.
Most often extruded acrylic is used when the engraved areas are to be color filled because of the clear nature of the engraving. If reverse engraved, this clear engraving will not distort or shade the filled areas. Engraving settings are similar to cast. Extruded acrylic does have an advantage in edge clarity when laser cut. It is much more smooth due to the lower melting point.