[chevyrestoguy]

Those shrinking discs work great, and yeah, they are noisy! Just make sure you inspect it closely before you use it each time. Over time, they can start to crack, and they can come apart when they wear out.

I was really skeptical when I first saw them, and I watched a live demonstration when Sunchaser used to sell them at the Pomona swapmeet. They had an old '30s Plymouth front fender, and they bashed a giant dent in it, and after about 3 minutes of hammer and dolly work and about 3 minutes with the shrinker, it was gone. I was sold! I bought one right on the spot.