Hi Mike

Thanks again for the input, i am not 100 decided on what type of method i will be using for the mould, i just saw a company called "smooth on " on you tube and they seemed to have mould kits for almost any situation, but i am open to any suggestions, and i will certainly be looking at dental plaster. {did you suggest this to be used in the cnc router?} just wondering about the sealing and release agent with the plaster?
anyway the 2 images below are typically the results i am looking for and any advice in achieving this would be very welcome.

thanks

peter

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