[TOGWT]

Originally Posted by *********

Paint protection film.

Btw, the trim is made out of aluminum. Not chrome.

Aluminum Oxidation

Aluminium alloys are an alloy in which aluminium is the predominant metal. The highly reactive nature of aluminium metal is normally masked by the protective oxide film which readily forms in moist air and renders the metal kinetically stable. Galvanic corrosion can occur when an aluminium alloy is placed in electrical contact with other metals with a more negative corrosion potential than aluminium, this is sometimes called ‘white rust’.

Uncoated (to test apply a mild polish, if the applicator turns black there is no clear coat finish) aluminium can be polished with a water-soluble polish (Happich Semichrome Polish or Autosol)