I can do scissors on my wet stone grinder using a jig. With properly constructed hedge shears you also need a jig but unless you’re a high end professional you’re very unlikely to have the equipment and expertise to achieve a good pair of mating edges. If you get the line wrong you’ll completely ruin them.
I do as Tyler has suggested. I have diamond laps that I use for touching up but every few years I take them to a pro for a proper regrind.. I do a lot of things myself however my good shears are beyond my skillset.
