The mesh looking inserts on the lower part of the bumper/ front spoiler? I use Griots spray on car wash (lubricant that adds gloss and some wax protection). I scrub it with a light touch horse hair brush. After that if you want..add a interior protectant wipe (I use griots) It's like a dressing that can also be used on tires...
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Jimmy
1988 325i sedan (Cirrus Blue Metallic, Silver Grey Leather)
2011 128i convertible (Blue Water Metallic, Grey Leather)
2013 320i sedan (Sapphire Black Metallic, Black/Black)
2016 228i convertible (Mineral White, Oyster Leather, Luxury Line)
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