OK, on the way into work this morning I thought I would pour some horsehead jigs tonight. Now I know people use foil etc for the swivel so you can heat and paint the jighead and keep the swivel turning freely, but I thought "there has to be a better way" and that way would be a tube form over the swivel. Now heat shrink would work but then you have to cut it off etc and other soft materials would melt with the heat. Hard tubes wouldn't work either.
So here is my possible solution: pour some RTV silicone in a straw and let it cure. Cut it in lengths that will cover your swivel. Poke a hole through it lengthwise with a heavy needle. You can now slide it onto the swivel, heat up the bait, paint and then pinch the silicone to remove it. The main worry would be it will remove a bunch from the jig head itself too. The silicone can definitely handle the heat.
Please discuss!