Step 3: Paint job and done!
Paint your poops white first, it will help the brown paint to look more realistic. Actually, I used two different brown colors to make them look even more realistic.
If this a one-time-prank just let them dry and you are ready!
If you want keep your masterpiece and prolong his life for future pranks, you should lacquer it. Lacquer will make it shine a little bit and help the paint stay on it.