Every so often, I'm going to go off topic and show you some of the "maker" stuff I do. I have a Tumblr account that I use to show off my prop replica making, and some of my more successful YouTube videos have been me showing how these techniques are put into play.
Today I'll show you a video about how to make silicon molds. I'm molding up an aluminum piece that I use for making a replica of a Bat-a-rang from a video game called Arkham Asylum.
The next step involves making a resin copy of the piece. I'll post that up next week sometime.
Just for fun, here is the finished product. (The piece I'm working on is the little disc on the top of the replica)