Do you recommend anything like Smooth-On molds or Compismold?
Melamine laminate is great, and so is any structure lined with acrylic or silicone. Smooth-On will work, but the finish quality will depend on the smoothness of your application.
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Concrete molds are usually urethane rubber because it is much stronger and cheaper than silicone rubber. This matters a lot on larger molds. Smooth-On sells all kinds of rubber you can pour or paint on, so does PolyTek and others. You will get the same surface texture in your rubber mold as the original [pattern] had. As a rubber mold ages, the surface slowly degrades. You should get 60 casts from a decent mold before it goes south.