I put Forever Black on my bumpers, trim etc. last fall. The foam tip applicator made the work easy (I would never use a spray kind). Two coats later, everything looked good. However, I am told the bumpers were originally greyish and not black when the car left the factory. The detailing gurus will tell you it's a dye, don't use a dye unless all else has failed. All I know is, it looks MUCH better than it did before, and it has held up fine through one New England winter.
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'97 850 n/a Wagon, 125K mi