Acrylic Cutting Help

[AdCNC]

If your chip evacuation is not sufficient then this is normally the cause of this. Do you use a decent vacuum to remove the chips as they are being cut? What tends to happen is if you start to recut the same chips they become hot and rub and "smear" around the cutter and are deposited on to the material edge and result in what you see in your picture!.. thats what ive come across in the past.

Failing that use some wet+dry like 1200 grit to clean the edge then give it a lick with a blowtorch preferably using MAP Gas as this burns hotter and has less oxygen content so less contamination of the plastics edge.