howdy.. this past weekend, i decided to try and remove the nasty brown stains from my grey dash. i used a j-cloth and warm water and was able to clean the mess up quite a bit however, those stains (although much lighter) are still there. i have a feeling that the stains were mostly dirt from years of storage but there are still large, ugly brown patches on my dash. i vaguely remember seeing a post about this subject quite some time ago, but was unable to find it in the archive.. any suggestions??