Continue writing the next sentence.

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