No Effort

Ok guys so I've making my own hard resin baits for a while now and have that down pretty well. The only experience I have with soft plastic is microwaving and pouring small things like tails and fins. I have an 11-12" hard deadstick bait that I want to make a soft plastic version of. Many of my questions have been answered by searching the site but still have a couple more. My questions are these: 1. Does anyone know what kind of plastic Huddleston uses? 2. Is it possible to use my existing hard body as a "skeleton" and pour soft plastic over it? If so how can I go about doing this? 3. If 2 isn't possible what's the best way to go about pouring a bait of that size i.e. What kind of mold? And do I need a melting pot? Sorry for all the questions guys but I'm clueless when it comes to soft plastic. Thank you