Uh, boy; the painting process makes the initial construction feel like a breeze. Welp, all that's left now is the opposite face and the edges. I've got a decent method worked out now, so it should go a bit faster; let's just hope it'll be done within a week!
Apple Barrel acrylic paint is what I used here; nothing special, but it works well and is quite inexpensive!
Link
Glaringfeline
This looks like it could be official Minecraft merch, that's awesome! Are you going to use anything to seal the paint after it dries?