I needed some wooden crates to put on my 1/35 dioramas. After looking at various commercial products, I decided to try to make my own, and cast them.
I used various pieces of styrene to scratch build a few crates (the red one is a carved Lego brick, with bits of styrene added). The rope handles were made with small “strings” of epoxy putty (Magic Sculpt).
Once I was happy with the crates, I glued them on a thick sheet of styrene and used Lego blocks to form the “walls” of the mold.
Smooth-on products were used for the casting: Rebound 25 for the mold itself and Smooth-Cast 300 resin for the pieces.
Apart from the fact that a few air bubbles left some small holes on the surfaces (I later used some epoxy putty to correct that), I am quite happy with the result.
And now I can make as many crates as I need! Great!