Toilet Paper Scenery Base:
I used a cheap 2 inch brush – about a $1 from the Dollar shop. The white glue was mixed in an old 500ml. white glue bottle and squirted into a milk bottle bottom I used to hold it to brush onto the paper. The plastic milk bottle is easy and cheap – just cut it about 75mm from the base and you have a good dispenser.
Layer the paper so you end up with a few thicknesses. A single sheet is not sufficient strength unless it is on top of foam.
Where the paper spans an area I have found once dry it is a firm base but not sufficient to insert trees etc. So I still use the "Top Coat" plaster over the toilet paper base.