Question about Cars & Trucks
Can be several reasons. Some types of plating or covering is the top finish of the wheel, but the base metal is a different color and not pretty.
I have seen chromed wheels bleed down to the core behind the lead wheel weights. Those left a bronze mark in the same place and outline of the lead weights.
Now there are different procedures in producing a finish on metal. Some use an acid bath and different chemicals produce colors in metal. Sounds like the wheel you have could have been surface etched and now the top finish is rubbed down below its finish. Some makers use a clear coat to maintain the finish longer.
You should contact the Car company who made your wheel for ideas about refinishing them. Now there are some excellent spray paints for coating wheels and the cost is minimal and some use spray cans and others need air compressor spray guns. Likewise some need an adhesive base coat and some need a protective clear coat. Its all about compatible layers of coatings.
My personal experience, for instance, on my 83 GM Pontiac Aluminum rims was to use the finest grade steel wool and remove the old chipped surface by hand rubbing to clean metal. Then using Mothers products to hand buff to a brighter finish and then thoroughly remove all traces of chemicals with an alcohol wash. The top coat was a spraycan application of specific "Wheelcoat" clearcoat.
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Posted on Jan 18, 2013
I found this on the internet.
Why is my chrome turning yellow -OR- Why won't my chrome shine anymore?
Your chrome may be dull or turning yellow for a couple of reasons. The first might be a poor plating job. The second reason could be from using an abrasive chrome polish that, over time, has scratched the chrome right off your part. Once the nickel is exposed, it will tarnish (turn yellow). Replating is necessary in either case. See the Chrome Care page to see how we recommend taking care of your chrome.
Posted on Jan 18, 2013
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Posted on Jan 02, 2017
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