I have learned a couple things about embroidering over acrylic paint or paper:
- Always use a thimble, goddamnit! A painted canvas is stronger than the top couple layers of your skin. Needles are pretty pointy at both ends. Using a sharper needle is also a good idea.
- Also: puncture the canvas/paper from the front (even if your needle's in the back). This one is less painful if you forget, but it does make things look nicer.