Caswell is what I used to reline my wife's tank. She has a $5k custom paint job. The directions tell you to wrap the tank in plastic celephane, then wrap in aluminum. That's how I did it and no problems. Be sure to plug your lines on the bottom that equalize the tanks. I used long chop stix, went down through the gas fill hole and had about 3" sticking out the top. Mix your liner up, put it and let is set just a few minutes, then pull your sticks out before it hardens. The liner itself works great. Easy to do. Just a pain to get all the prep done.