So I found a quick and simple way to make the mouth I currently have in use better. All I did was rip off the mouth and dremeled off spider-man's mouth. To make the mouth fit his face better I took some scissors and started cutting the part that stuck out but it was still too wide so I chopped off pieces of the side to fit it better and voila It's done and it only took 15 minutes. I am still gonna get miliput and re-sculpt his mouth but I just wanted a better looking one in the mean time.