ET Ettia Tatum Jun 19, 2016. So in short, cleaning won't increase the value of any coins.
The faucet should have enough water pressure to get the job done, so avoid any add-on to increase the pressure, like a jet. Not a single scratch or mark! Dry with a clean, soft cloth without rubbing. This technique is very similar to the pencil eraser technique except that we add a little bit of ketchup to the process to help remove the oxidation.
Wait about five minutes and check your pennies. As this determines the value of old coins, it is well worth preserving.
Acetone is flammable. There is standardised grading for coins, so even the smallest scratch from wiping one off can significantly reduce its value.
Dishwashing liquid Warm water An old toothbrush Soft clean cloth. If you decide to use soapy water as mentioned above , remember to use distilled water, as the water from the tap can be harmful to your coins.
A final rinse with distilled water adds shine — Distilled water is free of any impurities or minerals, so it can rinse away any contaminants in tap water. Ketchup can splatter on people and things. How can I clean them?
Learn More. Let your coins soak for anywhere from two hours to a week, depending on how dirty your coins are. White vinegar for cleaning: