use a butter knife of something similar, heat it with a propane torch and use it to flatten,ect.. its works well as a way to attach appendages aswell, this method works well if you keep you "tool" clean with a rag and razor blade to scrape the burnt plastic off- this method is smoky/stinky so ventalate- but you will not be disapointed.. you need to keep the "tool" hot-hot for a smoth fin. pour out a glob of platisol on something and exp. with it first, also when your done with the pour you can use a torch to give your lures a nive shinny wet look, but keep the torch moving 6-8" away and sweep back and forth like your spraypainting/airbrushing something.