We are covering the forms with paper now. These students are doing so well that they complete whatever I bring in for the day. This is another messy job but we have a big tarp under the work table to contain the mess. This time I am using unyru paper rolls and diluted elmers glue. I love this paper but it has gotten too expensive to use in my future school projects. I will switch to bogus paper available at places that sell packaging material. It is recycled newsprint and kraft paper but slightly heavier. You need a paper that is unsized so it is more malleable. Sized papers are stiff. Unsized papers eventually become pulp. Unryu is very strong,stays workable for a long time and covers in one or two layers. Bogus paper usually requires more layers and isn’t as malleable but it works well enough and it’s cheap. My personal favorite is blotter paper. It is thick and covers in one layer but turns to pulp fast so hard to use with kids. Last year I used what I called art snot as an adhesive with what I called bogie paper. Great art terms for 2nd graders. It is methyl cellulose and I used Elmers art paste. I had trouble with the layers de-laminating and haven’t tested it again so I went with white glue which I know works. The paper needs to form a hard stable surface over the foam.