We made marbled Christmas wrapping paper one year when I was a kid out of a bunch of dreg cans of house paint Dad had keftover from jobs that year. Drizzle latex in with oil base and maybe hit it with some sputtery spraybomb that was losing its propellant, or just poke a hole in the can and sprinkle some on top and swirl it all a bit with a stick. We used end-roll newsprint to soak it up and nobody wanted to tear it open on Christmas day, everyone was digging out their pocketknives and carefully slitting the tape to save the paper. Still have some somewhere.