I did this on the front fender of my '85 250SX, and its whiteish colored. What did I do wrong? I started with 220 for about an hour and a half to get otu all the scratches, then moved onto 400 for about half an hour, then 600 grit for abotu 15 minutes, then i went to 1000 grit for probly 20 minutes, and then i used 2000 grit for a good hour, and its still white. When its wet, its very nice and red.. but then it dries and its all white colored and gross...