- 1). Start with a clean fireplace cap. If your chimney was recently swept, there may be soot, dust or other debris on your fireplace cap. Clean the metal cap well with a rag soaked in plain white vinegar.
- 2). Apply a coat of metal primer all over the cap. You can use a spray-on type of primer or paint on a traditional formula using a paintbrush. Let the primer dry completely, 4 to 6 hours.
- 3). Paint the fireplace cap using a heat-resistant metal paint meant for outdoor use. As with the primer, you have your choice of spray-on or brush-on paints. Apply this first layer of paint evenly, covering all outer areas of the cap.
- 4). Let the paint dry 3 to 4 hours and apply a second coat. Be careful not to apply so much paint that it drips. Allow the cap to dry 24 to 48 hours before using your fireplace.
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