Extreme Paints Garage & External Door Paint for Durable Gloss 20.0 kg

Surface Preparation:

Before painting, remove all grease, dirt, rust, and loose paint from the door or metal/timber surface. Sand any glossy or smooth areas to create a key for better adhesion. Ensure the substrate is completely dry, with moisture levels below 4%, to avoid peeling or blistering. On timber, fill cracks or imperfections with a suitable filler and sand smooth for an even finish.

Priming:

For bare or rusty steel, apply a compatible anti-corrosive oxide primer to protect the metal and improve adhesion. Aluminium and galvanised metals require either an etch primer or a universal metal primer to ensure the enamel bonds properly. Previously painted surfaces should be sound, clean, and de-glossed. Always allow primers to fully dry before applying the topcoat.

Mixing:

Stir the paint thoroughly using a paddle mixer for at least 2 minutes to ensure the pigment is fully dispersed. Proper mixing ensures a consistent colour, sheen, and smooth application. For spraying, check the consistency; thin up to 10% with white spirit if necessary, but avoid over-thinning which reduces film build and durability.

First Coat:

Apply a thin, even layer of paint using a brush, short-nap roller, or suitable spray equipment (HVLP or airless 0.015–0.017” tip). Work along the grain of timber or in the direction of the metal panels to avoid streaks. Ensure all edges, corners, and recessed areas are covered to prevent exposed spots that can rust or degrade over time.

Second Coat:

After 6–8 hours at 18 °C, apply the second coat at right angles to the first. This ensures full coverage and an even film thickness of approximately 50 µm dry. Multiple thin coats give better durability and gloss retention than one heavy coat, and reduce the risk of runs or sags on vertical surfaces.

Curing:

Protect the painted surface from rain, dust, and debris for at least 24 hours. Light handling is allowed after this period, but full mechanical and chemical resistance develops after 7 days at 18 °C. During curing, avoid exposure to extreme temperatures or frost, which can compromise the finish.

Pro Tips:

For best results, apply in temperatures between 10–25 °C and in dry conditions. Keep a wet edge to avoid lap marks and work in manageable sections. Mask edges carefully and remove tape while the paint is touch-dry to prevent tearing. Clean brushes, rollers, and spray equipment immediately after use with white spirit or standard thinner.