I recently purchased an used car with 17000 miles. The car looks great and I'm having a fun time cleaning the vehicle. The engine has a spark plug cover that has raised letters that I suspect is aluminum. There are a few spots of stubborn oxidation which of course does not respond to gentle detergents use tooth paste.
I cannot tell if these letters were coated or simply bare metal. I do have a dremel with a cloth polishing wheel and thought about polishing it with Wenol. I am hesitant in doing so simply because I'm afraid it may oxidize/tarnish again more quickly after this process given it may have an applied coating or perhaps simply removing the natural coat of oxidation may accelerate future tarnishing? Can someone give me some pointers on this topic that has an understanding of what may happen?
Thank you in advance.
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