As expected, release of the banksia nut was slow with quite a few pinch points where the silicone grabbed on difficult areas of the shape. As you suggested Jim, two cuts were needed to ensure the master could be removed. Quite a bit of the play dough stuck to the mould so it was soaked in a soapy water mix for a couple of hours before being hosed out. As you can see from the photo, there is quite a bit of detail and complex shapes within the silicone.
After drying, the first candle was poured. As beeswax shrinks away from the mould slightly, removal of the first candle was quite a painless process.
The finished candle turned out quite well. A wick test will now be required to see how the candle burns.