Yes should have explained better . It's fadingwhat do u mean... has the color started to fade?
robbo is correct to a point i was a paint sprayer 20 years ago and this was very common on the astras turning pink(oxidising) a good mop did the trick as it was a solid paint,milano red is the base coat it then gets the clear coat(laquer)but i have known the laquer turn milky so it may work on some with this problem however it is a fact that some colours on bumpers will show a slight colour difference,Not so sure...The top layer is clear laquer so the fade is below the clear coat
No amount of polishing is going to get that back ....except a respray
I hope I'm wrong
Best take it to a Pro detailer and ask