Form Core Filler?

[RuneCaster_Aris]

I see a lot of really cool models that are made of foam core, and one thing I've noticed is that the Styrofoam edges look completely smooth, what is used to give that appearance?

[inrepose]

Well I might cut it first with a hot wire cutter. You can create very smooth edges if you carve with hot wire. Then I might also use polyfilla which is a household wall crack filler in white. You can smooth it on and it will dry hard, so you can then sand it even smoother with a fine sand paper.

[kwi]

You can also be careful about your corners, cutting a channel through one side and the foam only that is the width of the foamcores depth allows you to make a fold without the foam being visible.