I use my coffee grinder a lot when I have big grained seasonings like Montreal Seasoning and want to grind it into smaller pieces. I do this a lot for seasoning steaks
Another tip: Grind some kosher salt and some seasoning into a fine powder to make popcorn salt. A lot better and far cheaper than buying at the store.
Weber Blue Performer
Weber 22.5 OTG with Weber Rotisserie
Weber Jumbo Joe
Santa Maria Style Grill