Reply to "Glue down ballast"

For portable modules, 50/50 water and white glue is a must. A few drops of detergent are sufficient. Following a suggestion I read in O Guage Magazine years ago, I start applying the mixture between the rails until it bleeds to the outside. Then soak from the top of the ties until the mixture bleeds to the outside edge of the ballast. Having already gluing the adjoining landscape, the ballast glue bleeds into this as well, making a durable finish that lasts and survives the obvious abuse that modules must endure.