I have seen quite a few cadillacs like that. I am not sure on the procedures on how to do this, but you may find a way to take off the plastic things and just paint them. If you can, you may be able to paint it a little right in the car. I konw this sounds like a cheapy fix, but it might just work.
The part's not expensive, The job's a little challenging but not bad depending on your level of expertise in mechanical repairs. My neighbor did his by himself and he's a self proclaimed idiot when it comes to wrenching. I didn't help him do the job so I can't really say how tough it was to do.
Kcnewell is right. The part is only about $40 and not too hard to change. I think what happens is that the cup holder is right over that part and liquid leaks on it. The black plastic part peels apart and then looks bad. Once changed, the car looks new again!!
Once you bought the car they look at you as pond scum. I rarely take my cars to the dealership , in fact I only take them to get a check up on the electrical system or the tranny. I do this once every 2 years.
I also prefer doing my own service work, except when the car is under warranty (duh). I think that if you get a service manual and you tackle this job it will pay for itself in the labor savings the 1st job.
Fortunately, here in town the dealers are nice to me (my dad is their doctor, HEHEHE), so i would go to dealers for stuff im not so sure on.
Common problem. The $40 part is no longer available. They want you to buy the compete shifter/indicator for about $90.
The shifter trim is like a cartridge. It rolls up at each end. You can dismantle this setup and apply new tape to the foil that is used to give it structure. It is time consuming and requires some careful work to avoid air bubbles etc. It is also difficult to trim around the shifter plastic part. But can be done.....