Why Do My Metal Dice Chip and Tarnish? Causes and Fixes

Quick answer

Most metal dice damage is surface-level and fixable: tarnish comes off with a soft cloth and a mild polish, and small edge nicks can be smoothed so they stop catching on the felt. Deep gouges, flaking plating, and pitting that changes how the die rolls are not worth repairing. Fix the storage and rolling habits first, because that is what stops the damage from coming back.

You pull your favorite metal set out of the bag and the d20 has a dull grey patch on one face, or a bright nick on the edge that grabs the table every time it lands. Nothing about your game changed, so it feels like the dice failed on their own. In most cases they did not. Metal dice are a finished surface on top of a metal core, and that surface reacts to three things: impact, abrasion, and whatever is on your hands.

The useful question is not whether metal dice can be damaged. It is which damage you can reverse, which damage you can only stop from spreading, and which damage means the die is done. This guide separates those three so you stop polishing a die that needs replacing and stop replacing a die that just needs a wipe.

What tarnish actually is on a metal die

Tarnish is a chemical film on the surface of the metal, not a layer of dirt sitting on top of it. Bare zinc alloy reacts with moisture, sweat, and the acids in skin oils, which is why the faces you handle most are usually the first to go dull. Aluminum behaves differently: it forms a thin oxide layer that looks like a soft grey haze rather than the darker bloom you see on zinc. Neither reaction means the die is structurally failing.

This matters because the fix is different from what most people try first. Scrubbing a tarnished die with an abrasive pad removes the film and some of the finish with it, which makes the next round of tarnish come back faster and unevenly. A soft cloth and a mild metal polish do the same job without stripping the surface.

• Wipe dice with a dry microfiber cloth after a session before they go back in the bag.
• Keep a separate cloth for polished dice so grit from other gear does not get rubbed into the finish.
• If a die is only dull, treat it as maintenance, not damage.

Why chipping happens at the edges first

Chips almost always start on edges and corners because that is where the die concentrates force when it lands. A metal die dropped onto a hard floor or thrown across a bare table hits on a point, and the finished surface there is thin. The result is a small bright spot where the finish has come away, sometimes with a raised burr that catches on cloth.

Storage is the second cause and the one people overlook. Loose metal dice in a bag grind against each other every time the bag moves, and a die with a sharp edge will slowly wear the finish off its neighbors. A case or a divided bag removes almost all of that contact. If your dice live loose in a pouch with keys, minis, or other metal pieces, the chips are not a manufacturing problem.

• Roll on a tray or mat instead of bare wood or stone.
• Store metal dice so they cannot slide against each other.
• Check the inside of your bag for grit; a single grain of sand will scratch every die it touches.

Fixes that work at home

For tarnish, start with the least aggressive option. A dry microfiber cloth removes light film. If that does not lift it, a small amount of mild metal polish on a cloth, worked in small circles and buffed off, will restore most of the shine. Keep polish away from any enamel fill, because it can dull the color. For a raised burr on a chipped edge, a few light passes with a fine abrasive pad in one direction will knock the burr down so it stops catching. Do not try to reshape the die.

For scratches on aluminum, understand the limit before you start. You can blend a scratch so it is less visible, but you cannot restore a brushed or anodized finish by hand. If the scratch is shallow and on a flat face, a fine pad followed by a polish will reduce how much it shows. If it is deep or crosses an edge, leave it alone.

• Work in a well-ventilated area and use a dedicated cloth for polish.
• Test any polish on one face you rarely look at before doing the whole set.
• Rinse and dry completely; leftover polish residue attracts dust.

When to stop repairing and replace instead

Stop when the damage changes how the die behaves rather than how it looks. A deep gouge that removes material from a face, pitting that spreads across the surface, or plating that is flaking off in sheets all mean the die is no longer the object you bought. Flaking plating is the clearest signal, because it will keep coming off and the exposed metal underneath will tarnish faster than the original finish did.

Also stop if you have polished the same die more than twice. Each round removes a little more finish, and a die that has been heavily polished will tarnish faster every time. At that point you are spending more effort on upkeep than the die is worth, and a replacement set is the cheaper decision.

• Replace if the die rolls differently or lands on a damaged face more often.
• Replace flaking plating rather than polishing it.
• If you have polished a die three times, retire it.

Prevention that actually holds up

The habits that prevent damage are boring and they work. Roll on a soft surface, store metal dice separately from plastic and from each other, and wipe them down before they go away. If you game in a humid climate or your hands sweat heavily, a quick wipe matters more than any polish, because moisture is what drives the tarnish reaction on zinc.

If you are buying your next set and want to avoid the problem, look at how the die is finished rather than only at the alloy. A finished surface with a protective coating will hold up longer than bare metal, and a set that comes with a case or a divided bag solves the storage half of the problem on day one.

• Keep a small cloth in your dice bag for post-game wipe-downs.
• Use a case for transport and a tray for play.
• Store dice dry; never put them away damp.

Diagnose your damage before you touch it

• Dull, grey, or dark film on the faces: Tarnish from moisture and skin oils. Wipe with a dry microfiber cloth, then use a mild metal polish on a cloth if needed. Keep polish off enamel fill. Fixable at home. If it returns within a week, your storage is trapping moisture.
• Bright nick or burr on an edge: Impact damage from a drop or a hard table. Knock the burr down with a few passes of a fine abrasive pad, then stop. Do not reshape the edge. Fixable once. If the same die chips again, change the rolling surface, not the die.
• Scratches on aluminum faces: Abrasion from loose storage or grit. A fine pad and polish will reduce how much a shallow scratch shows, but a brushed or anodized finish cannot be restored by hand. Cosmetic only. Stop if the scratch is deep or crosses an edge.
• Flaking plating or spreading pitting: The finish has failed and the exposed metal will tarnish faster than the original surface did. Polishing will not restore it and will remove more finish. Stop repairing. Replace the die or the set.
• Three or more polish sessions on one die: Each polish removes a little finish, so the die tarnishes faster every time. You are now maintaining the die more than using it. Retire it. Put the effort into storage and a tray for the next set.

Sets built to take the wear

• Gravestones - Shadow Demon - Metal Dice Set: 14mm polyhedral dice in blue alloy with black enamel fill. The enamel fill sits in the recessed numbers, so it is protected from the table contact that wears down raised faces. Wipe the enamel gently and avoid polish on it.
• Bronze Dragon Scale Metal Countdown Dice 25mm: A 25mm zinc alloy countdown die with a dragon scale finish. A die this size hits harder and lands on its edges with more force, so a tray matters more than it does for a standard d20. Check the edges for burrs after a hard drop.
• Berserker's Frenzy - 7 Piece RPG Set 6063 Aluminum Wondrous Dice: A seven-piece set made from 6063 aluminum. Aluminum resists the dark tarnish that zinc develops, but it scratches and scuffs more visibly. Store these separately so they do not grind against zinc dice.
• Mimic Die - Hard Enamel Adventure Dice Pin Metal by Norse Foundry: A hard enamel pin with a metal body, available in multiple colors. Enamel over metal is the same construction as filled dice numbers. Treat it the same way: no abrasive polish on the enamel, and keep it off keys and other metal in a bag.

Metal dice chip and tarnish because of impact, abrasion, and moisture, not because the alloy is bad. Wipe them dry, roll them on a soft surface, and store them so they cannot grind together, and most of what you are seeing now will not come back. When the finish is flaking or the damage changes how the die rolls, stop polishing and replace it.