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None of those automotive products will hurt metal. I doubt they will affect inorganic finishes like bluing, plating, or Parkerizing. Find an out of the way test spot on plastic or coatings.
However, they are all different blends of assorted solvents. Chlorinated vs nonchlorinated, flammable vs nonflammable, non-toxic vs as tough as they can sell over the counter. Read the label and take precautions. I use Berryman's Electric Motor Cleaner, which is nonflammable and supposedly low toxicity. But I still use it outside.
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