the car had just been imported from japan and the spoiler was sun burnt so to speak so the original lacquer was very flaky, i just got the power washer to it to strip the lacquer off as it didn't take much to remove it since it was really bad. when the spoiler was down to the carbon, i then sanded it with 800 wet paper and then lacquered it and the job was a good'n, (a fine sanding paper is best as you dont want to scratch the carbon)