Check the listing for details. Gtechniq C4 Permanent Trim Restorer & Protective Ceramic Coating 15ml. Condition: New. Listed at 47.99 USD. The Gtechniq C4 Permanent Trim Restorer & Protective Ceramic Coating is a high-quality product designed to restore and protect car trim. With a volume of 15ml, this ceramic coating from the trusted brand Gtechniq effectively forms a long-lasting armor on car surfaces, making it a reliable choice for automotive detailing and care. Its manufacturer part number is C415, ensuring easy identification and purchasing for customers looking to maintain the appearance of their vehicles.