Hey Bass Junkie
No matter what type of plastisol, it will start burning after too many reheats, it turns it into this brownish mix and may finally burn into this stinky thing. I cannot comment on DO-It plastisol because I've never had the privilege to test any, I'm not from the US.
Heat Stabilizer definitely works to reduce batches burning from prolonged heating, but for now, after a few reheats, just add some virgin plastisol. The virgin plastisol contains some unused heat stabilizer. Think of heat stabilizer as sunscreen, you have to keep applying it regularly as you are working because it dissipates.
Another strategy that may help to reduce burning from constant reheating, is to do some tests seeing how many cups of plastisol makes a number of lures you need for a certain batch/color. For example, you would like to make 12 lures of a specific color, your mold is a 4 cavity, thus you would need enough plastic for 3 injections, think it would be around 4oz. Heat up the 4oz, inject and then put the measuring cup in the microwave, and maybe cover the top of the cup to reduce the loss of heat from the plastisol. Wait for the mold to cool down and then remove the lures. The plastisol in the cup should still be molten, give it a quick reheat and shoot again. You then leave the measuring cup outside, you then cut up all the pieces of left over plastisol from your injector and the sprue into small pieces and reheat for the last time and shoot again. Thus you reduce the number of reheats per batch. This will also help you to perfect recipes because you will know how much of what ingredient goes into the size of a specific batch.
Some of the guys here on the forum own huge molds with many cavities, they can use up to 8oz in one injection, also injecting more than one mold, so they only heat the plastisol once
