The pewter may come out of the mould with slight imperfections but these should be easily tidied up with filing, sanding and polishing. These models should then be ready to use to make the silicone mould. The advantage of the silicone mould is that it is more durable and can be used to make hundreds of casts before a new one is needed. You could potentially put numerous cavities in a row and even doubled up in the same mould so that you can make batches of casts at a time.
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