exterior of my '89 100

[AndyNYC]

I've got 2 questions regarding the exterior of my red 1989 100 (110,000
miles)... thanks in advance for helping me out:

1.  This weekend I used the car for transporting some mattresses on the
roof.  We used some tape to hold them on.  The tape came off the glass fine,
but a good amount of adhesive residue stuck to the painted parts.  Anyone
suggest a good solution for removing the adhesive without damaging the
paint?  WD-40?  Another degreaser?

2.  A while back a friend borrowed the car, I told him to pay me back he
could take it to a car wash.  He went to one of those self-serve places
where you stick quarters in and use the gun.  I think what happened is he
got some of the foam tire cleaner on the hood... which (we found out later)
you're not supposed to do.  So parts of my hood has lost its gloss, it also
appears to be a bit lighter than the rest of the car.  From casual
inspection, it looks as if the paint on the hood has faded from the sun, but
that's not the case, as no other part of the car is like this, and if you
look close you can see the fade is in the shape of some streaks and drops.
Can someone suggest the best way to get my hood looking new, like the rest
of my beautiful Audi?  Is it just re-applying the clearcoat, or will it
require a complete repaint?

Thanks!!

-Andy
andynyc at spacelab.net