Ever since I have owned my Delorean I have tried to battle this problem. My dash has a dirty/dark brown/black look to the gray. The stain seems to be gradually Darker as it gets closer to the windshield!. I have tried several off the shelf products with no effect. I have never tried anything too harsh just in-case I cause "dash-meltdown". A friend suggested painting it with a vinyl paint. Is their any cleaner I could try! Or maybe a paint. Can someone help? Thanks Guys. PS. As I look at it now, the stain seems to be deeply imbedded into the dash. Almost like the previous owner was a long time heavy smoker.