I was pulling at the papers and trying not to scratch them, since the acrylic is easily scratched...then, I remember what they told us at CHA to get the sticky brown paper off.
You take scotch tape and roll it sticky side out, and rub it against the brown paper, at the edge.
Keep rubbing and pulling it toward the center of the piece you're taking off....
As you roll the tape over the edge, toward the center, it will gently lift the paper up. Keep rolling until you have a good enough piece to grab and remove the rest of the paper
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