After I cut the hole, I ran my pinched thumb and index finger around the perimeter of the cut hole to show someone in the shop that you can indeed cut sheet metal using snips without leaving all those "metal splinters".
Robert, looking at Bill's aviation snip video (again, review is always good), I notice that he wasn't so fortunate, indicated by the bandage on his right index finger.
Anyway, my grip isn't what it used to be, and cutting a 16 gauge bedside with snips is a lot of work. That's why I recommended the nibbler. As Tim the tool man would say, "More Power"
