undercover starting to look weathered

i have an undercover tonneau on my truck that has been on it since new (aprox 1 and 1/2 yrs) i wash my truck at least once a week more if needed. i noticed that my undercover is starting to become weathered lookin like most black plastic does after some time in the elements. i use back to black on it quite often and it helps some but soon returns to the weathered ,faded look . anyone else with this issue and is there a product out there thatll help me return it to new?

 

weird, ive had mine for 2yrs looks brand new. and i live in chicago weather, u sure its undercover?

 

Like waxing any vehicle, too much can be bad. Maybe using back to black every week is too much??

 

Use kiwi black paste shoe polish.


Steve