Yes, toothpaste can clean coins because its mild abrasives remove tarnish and dirt, making them shiny, but this is generally a bad idea for collectible coins as the abrasives cause microscopic scratches, permanently damaging the surface and significantly lowering their numismatic (collector) value. For modern or non-collectible coins, it works as a quick fix for shine, but for valuable coins, professional cleaning or simply soaking in distilled water is recommended to preserve their integrity and worth, notes Gainesville Coins and Doylestown Gold Exchange.
In case these coins don't have any extra value or aren't rare (you should check that first), you can clean them by washing them with an old toothbrush and dish soap, and adding toothpaste to the mix for an extra shine. Rinse well and dry with a cloth.
If they say a gentle cleaning is OK, here's what you should do:
Thanks to its mild abrasives and detergent properties, toothpaste can gently lift away tarnish and grime without wrecking your jewellery. And, while I'm not saying ditch the polish for good, when you're in a pinch, it might just save you.
Cleaning vinegar mixed with baking soda can make a good homemade rust remover. The vinegar breaks down the rust particles and baking soda's gentle abrasive action scrubs the rust away. Does Coca-Cola remove rust? Coca-Cola, or Coke, removes rust if you have patience.
Steps:
Colgate toothpaste powder:
This method is usually used by professionals as well to clean tarnished silver jewellery.
The oil-base makes WD-40 reasonably effective at removing it without a lot of work. There is of course some sacrifice when this stuff is removed but fortunately the metal underneath is in pretty good condition and the coin, in hand, is much more presentable.
Soak your coins in olive oil (it is slightly acidic), WD40, or distilled water (not tap water or spring water). Few people have the patience to soak them long enough. How long - at least a few days, but weeks is usually better. Distilled water is faster, but only if the water is changed frequently (daily works well).
Cleaning coins is a delicate issue!
Personally, I always recommend soaking the coin in distilled water for 24 hours. This can help remove dirt without scratching the surface.
There is a simple homemade solution that is a great way to clean older coins without damaging them. The process involves distilled water, a tablespoon of mild hand soap, clean cloths, and an old, soft-bristled toothbrush.
Ultrasonic Cleaners
These coins are cleaned by using distilled water with a small amount of detergent in a special vibrating container. Acid based cleaners will eat away at a coin's surface diminishing its value.
Methods that work for silver jewellery can also clean copper – such as toothpaste and an old toothbrush. This method can take a while if cleaning pots and pans, but it's a reliable choice. Brush the toothpaste all over the copper cup and use the toothbrush to reach into any ridges.
You may notice the tarnish disappearing, and the silver becoming brighter. Keep adding toothpaste and rubbing it off until the tarnish is gone. Depending on how badly tarnished the piece is, this can take about 15 minutes. Rinse the jewelry in warm water.
A quick wash with soapy water will keep your sliver shiny but you have to remember to do it periodically. All you have to do is mix a mild dishwashing soap in warm water and gently wash each piece of silver jewellery.
Many toothpastes contain mild abrasives, such as baking soda or silica, that can help to gently remove tarnish and restore the silver's shine. However, it's important to choose a toothpaste that does not contain any harsh chemicals or bleaching agents, as these can damage the silver.
Please note: chlorine and bleach accelerate tarnishing and should be avoided. Once cleaned and polished, silver must be kept dry and properly stored.
Polishing Silver
The most common is using a soft towel and a silver polish cream like Hagerty's or Miror. Another option is to line a ceramic or glass (never metal) dish with aluminium foil. In a separate bowl, mix together one tablespoon of salt, one tablespoon of baking soda, and half a cup of white vinegar.
1. The Baking Soda and Aluminum Foil Cleaning Method. The baking soda and aluminum foil cleaning method is an excellent way to clean sterling silver jewelry with an intricate design, such as a sculpted pendant. For this method, you will need baking soda, aluminum foil, boiling water, a bowl, and a cloth.
Cleaning your coins
If you must clean a coin due to dirt or grime, use only a soft cloth or cotton ball with lukewarm water. Never use harsh chemicals, abrasive materials, or polish, as they can damage the coin's surface and affect its value.