Ken Peavey wrote:I do.
I take the shovel to the grinding wheel, put an edge on it. A sharp shovel cuts through roots with less effort, drives into a pile of material deeper, and makes it easier on my back. It's not sharp like a scythe. All I do is grind one side so the edge is more of a wedge and not blunt.
WD-40 can be sprayed on to reduce rusting. I skip the WD-40. I know a guy who slapped together a box, a couple feet on each side, filled it with sand, then poured in the oil from his last oil change. He sticks his shovel in there when he's done using it, keeps the blade oiled, prevents rusting.