Restoring Brass Without Ruining It

First, the rule that outranks all others: patina is value. On old brass, that soft brown mellowing took decades and collectors pay for it. Polishing a 19th-century candlestick to a mirror shine is the metalwork equivalent of painting over wallpaper — technically shinier, historically poorer.

So before you touch anything abrasive, decide what you're holding. Hardware headed back onto a painted door? Clean away. A maker-marked lamp or anything pre-1900? Stop at soap. Warm water, a drop of dish soap, a soft cloth, and thorough drying handles ninety percent of honest dirt.

For active corrosion — the green crusty spots, not the brown glow — a paste of flour, salt, and vinegar applied briefly and rinsed completely will lift it without stripping the surrounding age. Work in small sections. Rinse like you mean it; leftover salt keeps eating.

And check that it's actually brass: a magnet that sticks means brass plating over steel, and abrasives will cut straight through to grey metal. When the magnet sticks, the answer is always the soap, never the paste.