I found that it worked best when I stopped using their applicator, and used a rag instead. I'd apply the black dye to the rag, then rub it into the finish. Some of the unevenness was due in part to my extremely faded plastic. I think that if your plastic is only moderately faded, you should be okay. That said, the finish on my Jeep does look better than it did before I applied the product. Good luck. Post your results if you wind up using the stuff.
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1999 S70 T5