Mark the cut line clearly
Secure the plastic on a stable surface
Use a sharp utility knife for thin plastic
Score the line repeatedly until it snaps
Use scissors for very thin flexible plastic
Use a fine-tooth saw for thicker plastic
Use a jigsaw with a plastic-cutting blade for large cuts
Use a rotary tool for detailed cuts
Cut slowly to avoid cracking or melting
Support the plastic near the cut line
Wear safety glasses and gloves
Sand the edges after cutting