I had a new question. Since I shouldn't paint the coroplast sheets I was wondering if I could use sheets of black construction paper or poster board on the outside to change the color. The reason for this is because this coroplast was used at a ball field previously. It has lettering on it and I wanted to cover that up. The lettering is only on the outside and not on the inside of the cage so I would only put the constructions paper or poster board on the outside. If it would be safe can I use school glue and glue it on or should I use tape? Thanks.