I think the name tells the story.
I have used this product on my exterior black trim (wiper blades, rubber door seals, black trim in the engine bay) and have been blow away at how good it is.
Only a little drop is required on a foam applicator and you can cover both wiper blades and any trim around the wiper spindles.
With a matte black finish, watermelon smell and great non-oily finish, this product does give a "BLACK WOW" to your exterior trim.
I have had this product on the car for 2 weeks, left in the elements outside (wind / rain / sun) and the exterior treated areas are still black.
The product isn't the cheapest ($34 for a 4oz bottle), but the "Less is more" theory needs to be exercised to gain maximum results.
Well worth a try and great if your about to enter your car in a show and shine and are looking for that "great natural showroom finish"
UPDATE:::::::
I just did the area around the wiper spindles on my car and below is a half / half shot