Used Gtechniq C4 Trim restorer on some 20year old faded black trim, lasted less than a year. Currently have a bottle of Solution Finish Trim Restorer and their bottle of sealer, although I think you can ceramic coat on top instead if you're already coating the rest of the car. Will see how long this one lasts...
However, from all reviews I've watched, cerekote always came out the winner, not sure why I've not tried that yet
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