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4: Test fitting the sty-
rene in the corner.
The sheet needs to be
slightly shorter than the
corner it will be filling,
otherwise getting it in
place will be difficult.
I usually leave the gap
at the top where it will
be less noticeable. If the
joint between the bot-
tom of the styrene and
the benchwork will be
hidden by scenery, a
bottom gap is good, too.
4
I used .060" sheet styrene for my first attempt at coving a back-
drop corner on my current layout. Styrene this thick doesn't like
extremely tight curvature but worked OK for the 10" radius in the
Canyon Creek corner. The corner in Oakhill required a much tighter
radius, approximately 3", so I switched to .040" styrene which is
much easier to bend. I was concerned the thinner sheets wouldn't
have enough edge thickness for the spackle to hold it in place, but
this hasn't proved to be a problem.
While the .060" styrene seemed to work well at first, over the
seven years it's been in place small cracks have developed in the
seam between the styrene and spackle (24) while no cracks have
are visible in the corners where I used .040" styrene. I'm guessing
