Automotive touch-up and aerosol paint exists to address a specific problem: exposed bare metal or primer on a vehicle body will begin to oxidise within hours of a chip or scratch, and once corrosion takes hold beneath the surface it is extremely difficult to arrest without professional intervention. Using the correct paint โ matched to the vehicle's factory colour code, which is typically found on a sticker inside the door jamb or on the VIN plate โ is the most important factor in achieving an invisible repair. A mismatch in shade or metallic flake density produces a visible halo effect that no amount of polishing will fully disguise. Paint products range from simple brush-in touch-up pens for stone chips, through aerosol cans for larger flat sections, to two-component systems with a separate lacquer coat for repairs that must endure weathering over several years. Motip and Dupli Color between them cover an enormous range of factory colour codes across virtually every European make and year combination, which is why their OE catalogue references are the most searched in this category. Surface preparation โ cleaning, degreasing, and light abrading โ accounts for the majority of the quality difference between a lasting repair and one that lifts within a season.
The factory colour code is usually printed on a label or plate inside the driver's door jamb, on the B-pillar, inside the spare wheel well, or under the bonnet near the firewall. It may appear alongside designations such as 'Colour', 'Farbe', or 'Couleur' depending on where the vehicle was built. Enter this code when selecting a paint product to ensure the formulation matches your car's original finish. On some models the code is also stored in the VIN data held by a dealer's system.
OE-matched products such as those from Motip or Dupli Color are formulated to the vehicle manufacturer's colour specification for that exact code, including metallic or pearl effect particle size. Generic aerosols use a simplified formulation that may look similar in isolation but will show a visible mismatch when viewed next to the original finish in natural light. For solid colours the difference is less pronounced, but on metallic, pearlescent, or effect finishes the match accuracy of an OE-coded product is significantly better.
For minor stone chips a single-stage touch-up pen or brush-in paint is usually sufficient, as the surrounding clear coat will blend the repair when polished. For areas larger than a few centimetres, applying a clear lacquer topcoat after the colour coat has fully cured provides UV protection and gloss depth that helps the repair blend with the surrounding factory finish. Two-component paints with a separate hardener offer the most durable and colour-stable results for repairs that will be exposed to harsh weather.
Most single-stage aerosol paints are touch-dry within 30 minutes in normal temperatures but require at least 24 hours before light polishing, and up to 7 days before a full machine polish can be applied safely. Cold or damp conditions slow curing considerably โ applying paint below 10ยฐC is not recommended as the solvents cannot evaporate at the correct rate, leaving a finish prone to blushing and poor adhesion. Two-part products with a hardener cure faster and more completely but require careful mixing and immediate use once combined.
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