My freelance ho scale layout I am building

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Believe the "pink foam" and the "blue foam" are exactly the same thing, but made by two different companies, one by Corning and the other by Dow <!-- m --><a class="postlink" href="http://www.cincy-div7.org/foam-scenery-construction.pdf">http://www.cincy-div7.org/foam-scenery-construction.pdf</a><!-- m --> - the one not to use is the white "Polystyrene Bead foam" that crumbles and gets little staticy bits everywhere, and that melts on contact with any petroleum-based glue