This 6x6 doodling template, Cosmic Bubbles, is one of my favs -
great with misting sprays as well as tinted modeling paste, clear gesso embedded with microbeads or glitter, etc.
I am making a super-large art journal and tried using this as a spray paint stencil. It came out blotchy and messy looking. I think it would work just fine if you colored it in with markers.