What does WD-40 do to brass?

Protecting and Preserving Your Brass Items

Brass adds a timeless elegance to any home, but keeping that warm, golden luster requires a bit of proper maintenance. Over time, exposure to air and moisture causes brass to tarnish, turning its bright finish dull or discolored. Fortunately, preventing this natural oxidation process is surprisingly straightforward.

One simple and effective way to shield brass from tarnishing is by applying a light protective layer. Products like WD-40 Multi-Use Product, mineral oil, or linseed oil work exceptionally well for this purpose. When applied sparingly, WD-40 creates a thin barrier on the metal's surface, locking out air and humidity to keep oxidation at bay without damaging the underlying material.

However, protective coatings are only half the battle. Everyday handling plays a major role in how quickly your metallic treasures age. The natural oils from your hands transfer onto the metal every time you touch it, accelerating the tarnishing process and shortening the lifespan of both brass and gold objects. To keep your items looking pristine, minimize direct contact or wear soft cotton gloves when handling prized brass decor.