Trains @ Station Studios

Model Railroading and Prototype Research

Dock Module: Backdrops

without comments

After reading a lot of differing opinions on backdrop materials, I decided to try 0.060″ sheet styrene. The best reference on sheet styrene backdrops is Marty McGuirk’s Back to Basics column in the April 2000 Model Railroader.

I had some difficulty locating a company that would cut a 4′x8′ sheet of styrene into 3 16″x8′ sheets. I finally found Commercial Plastics here in Calgary who did the cuts for no additional charge.

I decided on 12″ radius corners at each of the three corners of the module. In order to line things up easily, I marked the wooden module structure at key places. I then calculated the linear distance of backdrop need to match up with this point (using the rule that the circumference of a circle = 2*pi*radius; therefore the length of a 90 degree curve is pi*radius/2). Then I just put the styrene in place, matching up the marks as I went.

I used latex contact cement to glue the styrene to the wooden module structure which worked very well. Because a single 8′ section was not long enough to fit the module, I spliced two sheets together with an 8″ splice plate between them. I used styrene putty to fill the small gaps at the splice. Here’s a photo of the backdrop while the cement was drying:

Installing the Backdrop

At the left side exit of the module, I built a little flap of styrene to cover a very unattractive view of the benchwork which can be seen here:

Backdrop

One thing I would do different on the next module is to give the styrene a light sanding with a fine grit sandpaper before installing in the module. It is relatively easy to chip the paint on the unroughed sheet styrene. Touch wood; I have not scratched anything yet but the potential is there. Roughing up the surface would give the paint something to adhere to.

Written by Barry Cott

March 30th, 2001 at 10:21 am

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