First step is to get a bag of the 100% clay kitty litty and then pulverise it up to absolute powder.
Yeh, OK, you don't crush the kitty litter, you eat it... no, no, no. It is actually used to hold the rubber rock moulds level. So into a suitable plastic container you heap in some litter and then jiggle the mould until it is level and supported all round.
Sand would do better, but the bag I bought was wet and wouldn't mould itself very well. So while it is drying, the kitty litter will do.
Then you mix up your plaster of paris or moulding plaster or cornice cement or similar. Pour it into the moulds and jiggle them all about a bit and the level them out and let them dry.
When sort of dry, or not, after a few hours maybe, you can pop out the rocks.
Now to go make more as the club layout needs a pile of them. We will paint them with suitable coloured washes to get them looking just right in the end.
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