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If you want to make a permanent mold for casting metal squids, do not use the plaster mold but send it to a foundry and have a bronze copy made. To save yourself work later, make sure you carve out a pouring hole in the mold before sending it to the foundry. Even so, when the bronze mold comes back from the foundry there is a lot of work to be done before it is ready to use. First you will have to file the face of the mold with a flat file so that it is level and smooth. Then file and grind the inside of the bronze mold, using small triangular and pointed files or a small electric hand-grinding tool. Smooth out all the rough surfaces and corners of the mold and then finish the job with emery cloth, starting with a coarse grade and finally with a smooth grade. After the inside of the mold is fairly smooth, polish it with crocus cloth. The idea is to get the inside of the metal mold (which forms the squid) as smooth and polished as possible. Then, when you cast a metal squid, it will come out smooth and shiny.
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