Hey everybody, I've got a 1992 cr250 that has a tank on it that has yellowed over the years, or at least gotten dingy. Any way to clean up the tank to restore it to its original white color? any solution to put the tank in, bleach? anything like that? anybody seen the trick with a razor blade and heat gun to give old plastics a new shine? anyone think that could work? Thanks in advance for your help!