Gtechniq C4 Permanent Trim Restorer 30mlWhy Use Gtechniq C4 Permanent Trim Restorer? Gtechniq C4 Permanent Trim Restorer is a professional grade trim coating that chemically bonds with your vehicles exterior plastic surfaces. By integrating with the trim molecules, C4 forms a durable, optically clear protective layer that restores faded trim to an as new condition without leaving an unnatural gloss. Unlike many traditional trim products, C4 is extremely thin (~30 nanometres), providing