Ok lately I've been making a lot of the Iron Man latex neckseals, but every once and a while I get one that has a good amount of air bubbles on the outer surface of the neck, but when I slipcast with the latex in the plaster mold I don't see any airbubbles on the latex, it's when I pull it from the mold I find them. Now is there a easy way to resolve this problem? Do I need to vibrate the mold, is there something I can do to the mold surface before latex is poured in? Any suggestions?