Also, as an FYI to you all. I have stumbled on a neat little site for renting specialty videos. It works similar to NetFlix, but is focused more on educational videos. Subjects include welding, sculpting, molding and casting, Special Effects, etc... it is SmartFlix dot com. The titles are usually about $9.99 to rent, but considering that most of the titles are between $20-$50 and up when purchasing, it's a bargain.

I wanted to learn about the casting and molding just in case I need to create a custom piece out of clay or wood, but want to cast it in resin, or be able to reproduce more quantities.