He's referring to the black B pillars outside the car. These get worn from sun and weather, and turn a blotchy black/gray in some cases.
Unfortunately, these are hard to restore. My particular car does not suffer from this because it is always garaged, both at home and at work, so it rarely sees sunlight. However, I've tried helping my LS friends do a bit of restoration on these parts, but with little success. I tried a claybar, which took off some oxidation, but did not restore them to their original condition. Polish had the same limited results. Topical treatments such as WD-40 or Armor All only last for a short time. You may want to try polishing compound, but be careful with that!
In short, I've not come across an effective regimen to restore the black B pillars. In the absence of a good solution, you may want to consider simply replacing them with new ones.