There are other ways to get the weathered look without obscuring the wood the way spray paint does. And, unless you are just a crack shot with spray paint, it’s harder to get consistent results if you planned on doing a lot of these signs. It’s harder to make it look natural, too. An easier way is a vinegar and iron oxide solution:
Cheap, easy to apply, natural-looking, and consistent. They also make barnwood stains, if you prefer a commercial product. Also easy to apply, natural-looking (I think, I mean I’ve never used it lol), and consistent, but maybe not cheap.
Excellent sign, regardless.