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How to Prepare a Steel Door for Painting

A steel door that needs repainting must first be sanded smooth.

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Step 1: Clean the Door

Clean the door well with a soft cloth and acetone or mineral spirits. Allow the solvents to dry.

Step 2: Sand the Door

Sand door lightly with 220-grit sandpaper to scuff up the surface (Image 1). You may be tempted to use a palm sander (Image 2), but you could risk taking off too much of the top coat.

Step 3: Rinse and Paint

Rinse off the door and allow it to dry. Paint door with a high-quality exterior paint.

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