Here's what happened when I tried to make It look new. A small brass powder compact, no idea how old. The kind of thing that's clearly been beautiful and currently looks like it hasn't been touched in twenty years.
Ten euros. I bought it to see if I could bring it back.
Brass tarnishes because of its copper content, it reacts with oxygen and moisture in the air and builds up a dark, brownish layer over time. (Pure copper does the same — same mechanism, same fix.) On something that's been sitting around for decades, that layer is serious. Underneath it, fine surface scratches from years of storage and handling.
The tarnish is the obvious problem. The scratches are more difficult to remove.
Buhron. Real pressure, and the tarnish started coming off and transferring right away to the cloth. Properly, not just the top layer. The surface underneath started to change too.
You can see it happening in the video, its amazing to see every time again.
The microfibre finishing pass is where it gets real fun, the mirror came up. That moment where brass stops looking like it's been cleaned and starts looking like it's been restored.
The reason the two-step approach matters is documented in our surface chemistry research — tarnish on brass and copper involves different chemistry than silver sulphide, but the principle of controlled abrasion followed by polishing is the same.
Fifteen minutes total. The video shows the whole thing.
Check whether your piece is solid brass before polishing. A magnet won't stick to solid brass, but it will to brass-plated steel. Polish plated pieces gently to avoid wearing through the surface layer. Solid brass can take as much work as it needs.
For brass jewellery, earrings, rings, chains, even instruments, the same process works. Body contact speeds up tarnishing on jewelry, so it needs attention more regularly than decorative pieces. (If you're dealing with silver jewellery too, the tarnish mechanism is different but the polishing approach is similar.)
The compact looks new. The mirror finish is back. It was a fun find and project. It's probably worth more now.
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