This silicone tutorial is a little odd when you first look at it. Whilst it appears to work, I think it would only be suitable for basic designs. Having said that though I have NOT tried this tutorial so just basing my opinion on what I can see. I love the idea of playing with a big glop of silicone though. Does that make me weird? Check out the tutorial and pop back here and tell me what do you think? Do-able? Full tutorial here.