David Combs wrote:

I've been out shoveling.

Problem: Snow sticks to the shovel, maybe 2 (3?) inches of
it.

QUESTION: what can I do to make it slippery enough that
the snow doesn't stick?

1. Ask your spouse to do the shoveling.

2. That didn't fly over here either. I paint a thick layer
of floor wax on both sides of the shovel every couple of
winters. More durable than spray-on solutions.