Re: Engine Polish
I have used the Meguiars NexTech 2.0 on plenums that were newer and still "Silver".
It produced a shine and did not lessen the silver color.
Using it on older already darker engines, it clearly produced a shine and did not noticeably darken the plenum further. However, it did not, of course, restore the silver color.
At least that has been my experience.
Marty
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