Guess Jason isn't talking on this one
I would if I had knowledge that was truly helpful. What I can best share is what not to do and offer a warning.
Be really careful what you add as it may not react well with the plastic. This may take hours, or months to manifest. I know mineral oil will make baits become hard, other organics like Soybean may not be compatible and cause oily rancid baits (phasing - migration of oils from the bait over time).
My best advice is to test it and keep samples for several months before selling it in your baits. I would also lean towards adding it to the bags vs. cooking it in the plastic. This will allow what is compatible to be absorbed, vs what isn't causing a break down or migration out of the bait.
I wish I had a rock solid answer I could offer up, but this is what I know. Hopefully there is a little something there that may help.
Jason