welcome to the forum i use meguiars ultimate black plastic restorer g15812 used on my 07 Fit plastics, now looking like new so far good.. used for 6 mos. apply as needed.

 

 

Newbie here, but I use 303 Protectant and recommend it. Use it on sidewalls, plastic trim and under the hood. Even on vinyl dash and leather trim such as steering wheel and gear shift boot. It is not silicone and lasts a very long time - if you try it be sure to read instructions.