If the clear coat has faded/oxidized or is peeling off anywhere only proper way to fix it is too take off the bumpers and fix them. wax, polish, clay bar isnt for peeling clear coat will not fix your issue...
Bumpers can be fixed pretty easy, you can actually scuff out and sand the entire cover, sand out the peeling clear coat with a DA or by hand with 220 or 320, take an air hose to the bumper and blow off the remaining clear coat thats peeling/lifting. Scuff up the remainder of the covers with grey scotch bright pads.. the sanded areas may need new base coat applied so primer the sanded areas, water sand your primer with 400...
Its always better to have a shop do them if you can find one to give ya a good deal.. "at home" fixes w/ out proper tools, paint supplies and spray guns never a good idea if you want a nice job. Some advise (Ive been working in BS's since I was a kid) Take your covers off the car if you can they have rivets used on S95's just drill out the center of the rivet find you a good shop and make a deal.. Independent smaller shops can sometimes give better deals.
2007 GT/CS Teksid block 76mm Turbo 606RWH
1995 GT 5.0 Cobra manifolds SVO Borla side exhaust