Yes, you can sharpen a folding knife but it is not always easy. Sharpening a folding knife requires special knowledge and skill to do it properly. The process of sharpening a folding knife involves removing material from the edge of the blade, which can be done manually or with an electric sharpener. Manual sharpening usually entails using a whetstone or diamond stone to grind away metal from the blade at low angles in order to create an edge that will hold its shape for longer periods of time. Electric sharpeners are much easier and quicker but may remove too much metal if used incorrectly resulting in a shorter life span for your knife’s edge. When attempting to sharpen any type of folding knife, safety should be paramount as there is potential for injury when handling blades during this process. It is best to use protective gear such as gloves and eye protection while working on your knives before beginning any sharpening procedure. Once you have taken all necessary precautions, following instructions carefully provided by either the manufacturer or person who taught you how to sharpen will ensure that you get great results without damaging the blade itself!