Draw Order for Surfaces

unhandled

#1

In this image I have planar surfaces whose edges are defined by line segments. The upper edge of the cyan surfaces matches the gray surface mathematically

Is here any way to get the gray surface to be “on top” as one could do with curves? In other words, I would like the cyan to be entirely hidden under the gray.

Even if I give the gray surface a small thickness to create a closed surface, the cyan comes through.