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Polyurethane vs. lacquer for bronze windows

The window manufacturer that I work for is just getting started in bronze windows. I have done some research on finishing bronze, but cannot decide if a polyurethane or a lacquer is the best way to put a protective clear topcoat on the bronze. The topcoat must also have a uv protective element to it as well. Which would protect the color of the patinated bronze longer, polyurethane or a lacquer?

Randy Cross
window manufacture employee - Louisville, KY, United States
May 20, 2009

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