Glue extra scraps of thick cardboard inside the model's larger cavities to prevent crushing.

For advanced builders, you can coat the inside with fiberglass resin or fill it with expanding foam once the outer shell is complete. 3. Software Support

Before gluing, use a marker that matches the paper color to color the white edges of the cutouts. This hides the "paper look" and makes the final object look like a solid piece. Reinforcement (Making it Truly Solid):

To make a high-quality, "solid" feeling paper model from such a pack, follow these steps: 1. Essential Tools & Materials Use heavy-weight paper or cardstock ( ) to ensure the model is "solid" and doesn't buckle.