Buttons

After a few conversations with people much more knowledgeable than I am when it comes to casting, it would appear that one of the best options for the button moulds is a two part, room temperature vulcanising rubber and pewter. That doesn't sound too difficult to organise, as there is a shop in Perth that sells all sorts of moulding equipment and materials. Shame its only open weekdays and difficult for me to get to in business hours. Might need to wait for a day off.