THIS ONLY WORKS ON PLASTIC TRIM!!! I AM UNSURE IF IT WORKS WITH ANYTHING ELSE THAN BLACK!
Find the offending piece of trim, such as this black trim on my insight that looks like garbage.
Apply a heat gun (I used the 1000F setting on mine) at about 1/2-1 inch away from the area. You must be careful, as if you apply to long you can warp the piece your trying to restore. I didn't do this, but come on, it's plastic, common sense.
Anyway, Viola! About 10-15 minutes of work and the car does look better!
Credits go to the guys on Insightcentral that I saw this idea on. I'm sure others have done it before, but I just thought I would toss this out here just incase it helps anyone.