I have to tell you I was intimidated by the thought of carefully making a master and turning it into a mold. All that's changed. I've read a lot about this in FSM and decided to give it a go on my current nightmare project. I'm building a 1/48 Elco PT boat and the kit I'm using didn't have everything I needed to build my subject piece. I need to make torpedo tube covers, radar domes, etc. This stuff just isn't available after market. So I decided to give resin casting a go. I can't tell you how many times I wish I had more of a particular piece from kit or after market casting.
I purchased the starter kit from Bare Metal Foil. It was expensive, but already I've made 4 different molds and haven't used half of the material yet. The product is incredibly easy to use and the results are amazing. I can't believe how flexible and forgiving the mold material is.
I'd be interested to hear from anyone out there who has tried this themselves. What techniques are working for you? Which products do you like best.