I've had CF parts on my car and my 350 before for over 4 years.
It depends on the source of the part.Never had a problem with Shine supplied
CF.looks brand new/Some EVO-R STUFF(BELIEVE IT OR NOT!)looks brand new.
My Mines lip on my 350 NEVER faded!.On the negative,all CF parts from AIT
are junk.They do not fit.The clearcoat is awful!.
If you are looking for covers for parts like B pillars etc,I've found ZCF to be the best.
their stuff is fantastic.The clearcoat is hard as rocks and has UV protect.
I've never had to recoat a new part .I wish I did with the AIT junk.

Does anybody have experience with thezstore carbon fiber stage 1 mirror covers?

I have them. They actually are from EVO-R. After 3 years, it still looks nice. From all of my CF and CF covers, only the door handles turned yellowish.

Thanks! I didn't know those came from evo-r as well since they cover the whole mirror not just the painted part, did u have to UV clear them before installing them?

I get every CF part clear coated before installing, It's not expensive and I don't want to worry about it yellowing.

^ this.

My orange CF still looks great after a year. I made them myself and so i put a couple of clear coats over the gel coat. If it yellows then you can polsih put a UV clear coat then wax.