Beautiful Pompeii Style Decoupage Project (art included)

Step 14 Why You Need to Blacken the Cut Edges

  The picture shows an unmarked arch element on the left, and a black-edged arch on the right. See the difference a blacked edge makes. Run each arch's edge against the side of a Sharpie marker, gliding along without stopping. It makes the cut edge invisible. Running along the side of the marker prevents you from accidentally marking the front.