Does anybody still use Dutchman (wheat paste) with strips of muslin to cover seams on flats anymore? I had to make a stone wall a few years ago, and we did not want to use foam, so I used newspaer balls drapped with square sheets of muslin that we doused in Dutchmen. I used a long steel rod that had a triangle shape bent out of the rod on one end as a whisk with the drill press. Stuck the muslin down on the wall surfgace and places a few staples around the perimeter of the muslin to hold it down. It worked quite well. We still have the scenery units today. I just have not scene people using dutchman. For lost in Yonkers I used a combination of white gaffers and wide masking tape.