To Restore, Protect, And Clean Every Color Exterior Trim. Black Again is BACK Again, and better than ever! Long a favorite and considered a must have in every pro's detailing kit Black Again is a rich 3-in-1 polymer formula that is unmatched in the industry in its ability to clean, renew, and protect all color exterior trim. Black Again is not a temporary fix. It provides a solution to the most common trim offenders: Oxidation, Sun Exposure, and Wax residue.