Yes, I assume GS wrapped prods from fear of breaking, with many dangerous shards. Medieval archers, simply laid a 'sicher' safety cord of plaited cord or leather down the back of the prod, to prevent its breaking and flying. Some modern makers, like Alchem and Slobows fit a bit of heat-shrink tubing around the center 6 inches or so, in case the prod fails. In fact, I've had a lot of experience with commercially made prods from the above makers, plus Darkwood Armory, and can count the failures of steel prods on one hand. And in no case was anybody hurt. A friend did break an aluminum prod in my shop once... it was only @ 65 lb, and resulted in a bandaid. But if you're not sure of your prod, particularly if it's a strong one, I think heat-shrink tubing would be a good idea. It won't add much weight or reduce velocity by much, and isn't unsightly. I say go for it. Geezer.