Can/Did we have a discussion about recasting?

I recently bought some casting resin and some silicone stuff for moulds, and I am going to try it myself, using this video as a tutorial (part 1 of 3):


I am not going to cast models of playable stuff to keep this thread clean of things smelling of copyright issues, but casting stuff yourself is sure an interesting topic and I am very interested in how finely detailed homemade casts can actually be. It looks pretty promising in the video, and I have bought the same materials as used by the guys of TWS.