Copper finials atop roofs add a touch of timeless elegance to any architectural design. Like any other outdoor element, they require regular maintenance to keep their beauty intact. Neglecting them can lead to the development of patina over time. In this guide, we'll explore effective ways to clean and protect your copper finials.

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What Is Patina?

Patina is the natural, protective layer that forms on the surface of certain metals over time, including copper, bronze, and brass. It develops through oxidation, which occurs when the metal reacts with oxygen and other elements in the environment. 

Initially, the patina appears as a greenish or bluish hue, gradually darkening and becoming more complex as it matures. Patina serves as a protective barrier against further corrosion and deterioration. 

The Cleaning Solution

Before delving into the cleaning process, you should make sure your copper finial is free from dust and grime. A clean microfiber cloth works wonders for this task. 

To prepare an effective cleaning solution, you'll need:

  • 500ml of water
  • 50ml of hydrogen peroxide (3% solution)
  • 1 ounce of citric acid

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Mix these ingredients together to create a gentle solution for your copper finials. Hydrogen peroxide and citric acid are readily available at most grocery and canning supply stores.

How to Clean Copper Finials

Make sure to run a patch test before applying the cleaning solution to your entire copper finial. Apply the solution to a small, inconspicuous area and wait 30 minutes to observe any adverse reactions. If all seems well, proceed to clean the entire surface.

Depending on the size of your finial, you may need to adjust the quantity of the cleaning solution accordingly. For larger finials, doubling or tripling the recipe might be necessary.

Clearcoat Your Copper Finial after Cleaning

To preserve the pristine appearance of your freshly cleaned copper finial, consider applying a protective clear coat. 

The components of a clear coat solution for copper may vary depending on the specific product chosen, but generally, they include the following ones:

  • Resin: Resins such as acrylic, polyurethane, or nitrocellulose are the primary components of clear coat solutions. 
  • Solvents: Solvents are used to dissolve the resin and facilitate its application. Common solvents include toluene, xylene, or butyl acetate, among others. 
  • Catalysts: Some clear coat solutions may require a catalyst or hardener to initiate the curing process. Catalysts promote cross-linking of the resin molecules, resulting in a tougher and more resilient coating.

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Ensure optimal conditions for clear coating by selecting a day with temperatures ranging from 65 to 95 degrees Fahrenheit and low humidity levels. Apply two light coats of the clear coat solution, following the instructions on the can.

To maintain the protective barrier year after year, plan on reapplying the clear coat annually. This simple step can significantly extend the lifespan of your copper finial and keep it looking as good as new.

Should I Let My Copper Finial Turn Green?

While some homeowners prefer the classic allure of patina, others strive to preserve the original luster of their copper finials. 

Ultimately, the decision to embrace or prevent patina boils down to personal preference.

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If you need copper finials for your client’s project, Sheet Metal Squad is here to help with our custom-made fixtures. Contact us today for a quote!