If you have any rubber items such as the Radiator holders, or the molding that goes on the drip rail on a monza or other rubber items that get dirty, rust covered, hard and not pliable, soak it in this stuff => http://safestrustremover.com/
It makes the rubber items soft and pliable again. The longest lasting example I have is the upper and lower rubber bushings for holding the radiator. They had rust embedded and were seemingly dried out. That stuff not only cleaned them up and allowed me to clean them up they are loose and pliable like new.
I am in the process of doing the strips that go on the drip rail on my Mirage and they clean right up and are soft and pliable again.... Its really cool stuff.