Maybe a coat with microballons/cabosil to give it a white color and smooth out the foam, or what was that white, sortof graphite type stuff? HBN or something.

: You will need to paint it anyway and a light color. Styrofoam doesn't like
: UV, breaks down pretty quickly in direct sunlight and will not live long
: if painted (or epoxy/graphite coated) a dark color. As I remember (I may
: be wrong) it starts to degrade at temperatures around 180 degrees. Surface
: temperatures under a dark color paint can reach nearly double that.

: Bill H.