'14 CTS-V LongRoof; '16 ATS-V Sedan,' 04 Trailblazer 4x4; '10 CTS LongRoof gone but never forgotten
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16,107 Posts
I have an old piston from one of my engines that I want to clean and put on my office desk. Of course, it has lots of carbon and is pretty grungy. What might be the best way to clean this puppy to make it presentable?