The Cougartron PowerONE weld-cleaner is our latest discovery in car exhaust cleaning and restoration. This device can take any old, corroded, or stained exhaust and bring it back better than new. Scott Ales, the mastermind behind dry ice cleaning for cars, showed me how it works on the exhaust of my 997.2 GT3 RS. If you've seen my reaction to this thing, you'll know it's next level.