I recently purchased a beautiful ’99 Jeep Cherokee Sport. The only problem with the exterior is the faded greying black exterior trim pieces. I tried a couple solutions, “Back to Black” and “Black Again” exterior trim finisher. They work on all colors, not just black.
There are others on the market but these were highly suggested in newsgroups and by friends. Simply wipe on the product with a clean cloth or cheese cloth then wipe off excss with another clean cloth. They both had identical results but the “Black Again” seemed to remove the oxidation better, judging from the darker areas left in application rag.
See images for a before and after. You can click them for a closer view
Above you can see unfinished on the left and finished on the right
Above you can see, that even from a distance there is quite a difference in color.
These are the products I used. If you have a newer Wrangler, those fender wells are probably, or someday will fade. This is a cheap alternitave to replacing them at about $3-$4 a bottle. One drawback is it must be reapplied in about 2-3 months, depending on weather and washing conditions