[header] How to cut polycarbonate [title] Use a sharp cutting edge to cut thin polycarbonate sheeting where accuracy is not important. [substeps] Some polycarbonate sheeting is almost paper-thin and useful for covering and protecting gardens, for example. [title] Use duct-tape to fix sheeting to a flat surface without stretching it because stretching it will alter the line of the cut. 
[title] Measure and mark the desired cut clearly. [substeps] Use duct-tape to outline the desired cut.