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      06-10-2020, 09:36 PM   #17
PR1MOWAGEN
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Drives: 2011 BMW 328i Touring
Join Date: Apr 2020
Location: Atlanta

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I broke down the kidney grilles yesterday and gave the rings a deep clean. This time I chose the 1" mandrel for a standard drill with M205 polish. This minimized the random oscillations, since I really didn't have a good way to secure the rings, so I had to hold them while I was polishing them.





Here's a good representation of the oxidation that was on them. See the line? The white spots were just dust, but it cleaned up really easy.





Here's a side by side of the finished ring and the unfinished.







And the finished grilles...




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2011 E90 328i M-Sport
Black Sapphire Metallic

When Understandable Logic Becomes Experiential Belief...
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