I'd like to see that process. Any chance you would make a video of making your plastics for us to see?
Some of my best memories as a kid are of pouring worms with my father and brother!
A bass fishing friend in Texas bequeathed my father all of his gear.
There was a melting pot for the plastic base and then we added softener and color. It had a lever type handle on the side, and even 7 y.o. boys could perform a perfect pour. He gave us lots of slightly flexible plastic molds of worms of various lengths and configurations, twin-tailed beetle spin bodies, crayfish, etc. After the plastic cooled, you just flexed the mold and everything came out perfectly!
We would pour the plastic a little tougher in the spring when the bass would attack anything. For summer fishing, we would use very soft pours that might tear after one strong hook set. However, they kept the bass on the lure long enough for youngsters to feel the fish and set the hook.
Great times!
(Actually, typing this up now makes me realize that we were given several hundreds of dollars worth of gear!)