Looks to me like some great injecting of some core shots in your 7.5" worm mold and then dipping the head and adding some great colors and eyes and then dipping some more...or something close to that...I can see that they were dipped. Really gives me some ideas!
Thought I'd show how it was done back in the day. This setup uses heat lamps and is still the easiest way (IMO) to heat and pour plastic. I started pouring plastic in 1974, I think. I still use this setup today.
I used a drill bit and acrylic paint from Walmart to make this kill spot on my swimbaits. It withstands dipping just fine and does not degrade over time.
Started pouring some finesse worms that require bagging. I'm using worm oil from a major supplier and it works great for bagging but soaks into the worms and they are dry and stuck together the next day. What oil can I use for packaging that will keep the worms lubricated in the bag? Thanks.