This door knocker was sculpted in plastiline. A silicone mould created from that and then fast cast. It was then treated with various paint effects to create the finished piece.
Using plumbers table, stippled, sprayed and rubbed back with wire wool
Copper spray with dirty down mid brown effect spray
Coat silicone mould in a silicone resin mixed with brass powder and then fast cast to fill the mould. Polish to give metal effect