That's a great idea. As far as I'm concerned, wax paper can provide a smooth and non-stick surface, making it a suitable choice for protecting your artwork during the pressing process. It is commonly used for crafts and baking, and its wax coating helps prevent sticking. Butcher paper has a smooth surface and can help avoid smudging or sticking. However, remember that it may not be as water-resistant as wax or parchment paper. If you don't have any of these specific papers on hand, you can also consider using clean, unprinted newsprint paper or acid-free tissue paper. These papers are generally safe for artwork and can provide a protective barrier.