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Repairing Surface Damage on Composite Doors

Published in Door Repair 3 mins read

Fixing cosmetic damage like cracks or chips on a composite door typically involves a simple process of cleaning, filling the damaged area, and finishing the repair.

Composite doors are known for their durability, but they can still experience minor surface damage over time. Fortunately, many common issues, such as scratches or small cracks in the outer skin, can be repaired using readily available materials and following a few straightforward steps.

Here's how you can fix damaged areas on your composite door:

Addressing cracks or chips promptly can prevent further damage and maintain your door's appearance and integrity. The process generally involves preparing the area, applying a suitable filler, and smoothing the repair.

Step 1: Clean the Broken Area

The first crucial step is preparing the damaged surface. You must clean the crack itself and also the area surrounding the crack. Use a suitable cleaner (like mild soap and water or an alcohol-based cleaner) to remove dirt, debris, and any loose material from the crack and the adjacent door surface. This ensures the repair compound adheres properly. Allow the area to dry completely before proceeding.

Step 2: Apply the Compound

Once the area is clean and dry, you can apply the repair compound. There are several good CoolSkin fillers available on sites like Amazon specifically designed for repairing composite surfaces.

  • Choose a filler that is suitable for external use and matches the colour of your door as closely as possible (many fillers can be painted once cured).
  • Apply the filler into the crack or damaged area according to the product instructions, usually using a putty knife or applicator.
  • Make sure to fill the void completely, pressing the compound firmly to eliminate air bubbles.

Step 3: Sand Down the Compound

After the compound has cured (drying time varies by product, so check the instructions), the final step is to sand down the compound.

  • Use fine-grit sandpaper (start with a slightly coarser grit if necessary, then finish with a finer one) to carefully smooth the repaired area.
  • Sand until the filler is flush with the surrounding door surface, creating a seamless repair.
  • Wipe away any dust from sanding.

Depending on the filler used, you may need to paint the repaired area to match the rest of the door. Ensure the filler is fully cured and the surface is clean before applying paint designed for composite materials.

Following these steps can effectively fix minor damage and extend the life and look of your composite door.

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